A Natural History of Rape
A Natural History of Rape: Biological Bases of Sexual Coercion is a 2000 book by the biologist Randy Thornhill and the anthropologist Craig T. Palmer, in which the authors criticize the idea, popularized by the feminist author Susan Brownmiller in Against Our Will (1975), that rape is an expression of male domination and is not sexually motivated. The authors argue that evolutionary psychology can account for rape among human beings, and maintain that rape is either a behavioral adaptation or a byproduct of adaptive traits such as sexual desire and aggressiveness. The authors also make proposals for preventing rape, and criticize as the "naturalistic fallacy" the assumption that there is a connection between what is naturally selected and what is morally right or wrong.
Cover of the first edition
Craig T. Palmer
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The book received extensive media coverage following the publication of an extract in The Sciences. It became controversial, received many negative reviews, and was denounced by feminists. Thornhill and Palmer were criticized for suggesting that rape is a reproductive adaptation, misrepresenting Brownmiller, making questionable comparisons between humans and non-human animals such as insects, their treatment of the naturalistic fallacy, and their proposals for preventing rape. In response to their suggestion that rape is a reproductive adaptation, critics observed that many rapes, such as those involving young children, the elderly, or persons of the same sex, cannot lead to reproduction. They also characterized A Natural History of Rape as poorly written, and suggested it was part of a trend to blame social problems on biological causes and had received unwarranted attention due to its controversial subject matter.
However, some reviewers commended the book's discussion of evolutionary theory, offered a mitigated defense of the view that rape has an evolutionary basis, or argued that the view that rape is sexually motivated is partially correct, while suggesting that rape might also involve a desire for violence and domination. Defenders of the book, including its authors, argued that much of the criticism it had received was misinformed and misrepresented what it actually argued. Commentators compared the controversy surrounding A Natural History of Rape to that provoked by the psychologist Richard Herrnstein and the political scientist Charles Murray's The Bell Curve (1994), and suggested that it was partly a result of larger controversies surrounding evolutionary psychology.
Thornhill and Palmer write that they want to see rape eradicated, and argue that improved understanding of what motivates rape would help achieve this goal, while false assumptions about the motivation of rapists are likely to hinder efforts to prevent rape. They write that rape could be defined as, "copulation resisted to the best of the victim's ability unless such resistance would probably result in death or serious injury to the victim or in death or injury to individuals the victim commonly protects". However, they note that other sexual assaults, including oral or anal penetration of a man or a woman under the same conditions, can also sometimes be called rape. They suggest that theory and research in evolutionary biology and evolutionary psychology can help to elucidate the ultimate (evolutionary) causes (as opposed to primarily proximate causes) of rape by males in different species, including humans. They argue that the capacity for rape is either an adaptation, or, a byproduct of adaptative traits such as sexual desire and aggressiveness that have evolved for reasons that have no direct connection with the benefits or costs of rape. They also discuss the "naturalistic fallacy", which they define as the mistaken assumption that there is a connection "between what is biologically or naturally selected and what is morally right or wrong." In their discussion of it, they cite the philosopher George Edward Moore's Principia Ethica (1903).
Thornhill and Palmer identify the anthropologist Donald Symons as the first author to propose, in The Evolution of Human Sexuality (1979), that rape is "a by-product of adaptations designed for attaining sexual access to consenting partners." They note that Symons has falsely been accused of basing his arguments on the assumption that "behavior is genetically determined", even though he explicitly rejects that assumption and criticizes it at length. They criticize explanations of rape put forward by social scientists, and as well as by feminists such as Susan Brownmiller, who in Against Our Will popularized the feminist view that rape is an expression of male domination that is not sexually motivated. Other feminist authors they criticize include Kate Millett, Germaine Greer, Susan Griffin, and Catharine MacKinnon. They criticize arguments that rape is not sexually motivated on several grounds. In their view, concluding that rape must be motivated by the desire to commit acts of violence because it involves force or the threat of force is as illogical as concluding that men who pay prostitutes for sex are motivated by charity. They criticize the argument that rape cannot be sexually motivated because rapists do not prefer sexually attractive victims by citing evidence that a disproportionate number of rape victims are women in their teens and early twenties. They also criticize Sigmund Freud, the founder of psychoanalysis, arguing that his influence led to "the widespread adoption of the myth that women subconsciously desire to be raped."
A Natural History of Rape received mixed reviews from Gregg Sapp in Library Journal and the philosopher Massimo Pigliucci in Skeptic, and negative reviews from the primatologist Frans de Waal in The New York Times, the biologist Jerry Coyne in The New Republic, the journalist Natalie Angier in Ms., the anthropologist Craig Stanford in American Scientist, and Publishers Weekly. The book was also reviewed by Sue Lees in The Times Literary Supplement, the science writer Kendrick Frazier in Skeptical Inquirer, and Tom Sanbrook in The Times Higher Education Supplement, and discussed by Erica Goode in The New York Times, Judy Quinn in Publishers Weekly, Marianne Meed Ward in Report / Newsmagazine (Alberta Edition), Lyn Cockburn in Herizons, the feminist author Jennifer Pozner in Extra!, and the philosopher Nancy Pearcey in Human Events. Thornhill discussed A Natural History of Rape in an interview with David Concar in New Scientist. Subsequent discussions of the book include those by the journalists Sharon Begley in The Daily Beast and Anil Ananthaswamy in New Scientist.
Sapp wrote that even the book's title would be regarded as "inflammatory". He believed that the authors' theories had a biological aspect worth considering, but also a questionable ideological aspect. He criticized Thornhill and Palmer's proposals for rape prevention as potentially offensive and predicted that A Natural History of Rape could generate as much controversy as the psychologist Richard Herrnstein and the political scientist Charles Murray's "infamous" The Bell Curve (1994). Pigliucci observed that the book was controversial because of its subject matter and the controversial status of evolutionary psychology itself. He considered Thornhill and Palmer's "general argument" reasonable, and rejected the suggestion that their view that rape is either an adaptation or a by-product is trivial. However, he believed that they were mistaken to reject entirely the idea that rape is motivated by a desire for "violence and domination", arguing that it was more likely that "both sexual urges and violence/domination play an important role in rape". He noted that while they pointed out that rape victims "disproportionately include females of reproductive age", others included very young or old individuals or persons of the same sex. He argued that a "social-psychological explanation" better explained such cases. He also argued that A Natural History of Rape was based on limited evidence, and that its authors ignored the fact that selection was not the only evolutionary force that could potentially influence culture and provided insufficient discussion of rape among non-human animals.
De Waal described the book as polemical and poorly written. Although he considered its authors honest and careful not to condone rape, he criticized them for providing few "real-life descriptions of rape" and for dismissing women as ideological while presenting scientists as objective. He argued that their view that rape is "primarily sexual" was, like the opposite position that rape is primarily about power, biased. He argued that they failed to support their view that rape is a product of natural selection with evidence showing that men who rape differ genetically from men who do not rape and sire more children than they could without committing rape, employed questionable comparisons between humans and non-human animals such as insects, attached undue importance to men's ability to detect female vulnerability and to premature ejaculation, ignored the fact that even common forms of behavior are not necessarily adaptive, and failed to distinguish between different kinds of rape. He objected to their view that rape is "about reproduction", noting that one-third of rape victims are young children and the elderly, that men rape women with whom they also have consensual sex, and that the majority of men do not rape. He considered the book potentially offensive, and suggested that its authors made insufficient use of psychology and evidence from primate behavior. He criticized their proposals for rape prevention, writing that they wrongly saw the United States as a typical country rather than one especially rape-prone, and ignored "cross-cultural information".
Coyne attributed the "furor" that followed the book's publication to the popularity of evolutionary psychology, itself partly a result of the decline of Freud's reputation. He wrote that while some evolutionary psychologists had responded to it positively, its authors had clashed with feminists. He considered their claim that "rape is at least partially a sexual act" correct but not novel. He argued that their hypothesis that rape is a byproduct of evolved human traits could not be falsified and was thus not scientific and was compatible with both the idea that rape results from male sexuality and aggression and the feminist view that rape is about male domination. He questioned their comparisons between humans and non-human animals. He found their attempt to argue for the adaptation hypothesis using contemporary statistics inconsistent with other views they expressed. He argued that evidence shows that rape often involves violence beyond that necessary to force copulation, and that many rapes are gang rapes or involve homosexual acts, but does not show that rape increases reproduction. He accused the book's authors of misrepresenting scholarly literature, including Thornhill's earlier publications, of ignoring positive contributions by feminists to legal and cultural change, and of attempting to use evolutionary psychology to control social science and social policy. He considered their proposals for preventing rape obvious in some cases, and foolish, harmful, or unsupported by evidence, in others. He concluded that A Natural History of Rape was "advocacy" rather than science, and compared evolutionary psychology to psychoanalysis, arguing that both used manipulation to fit "every possible explanation of human behavior" into their framework.
Stanford considered the book disappointing and "an ideological rant". He believed that it had received more attention than it deserved because of its controversial subject matter. He noted that it had "enraged those who consider rape to be first and foremost a violent act against women", though in his view it had received a "fairly positive reaction" from its authors' colleagues. Though he considered it reasonable to hypothesize that rape might have a biological foundation, he believed that Thornhill and Palmer's argument was based on inadequate evidence. He accused them of making "sweeping species-wide statements about male-female mating preferences", such as that humans are "mildly polygynous", based on superseded sociobiological predictions, of basing their claims on "pop books", and of engaging in "an impassioned and rambling bashing of the social sciences", and of wrongly considering an "any trait that seems well designed" to be an adaptation. He criticized their use of The Evolution of Human Sexuality, describing it as "an early think piece". He maintained that their data actually showed that rape has more reproductive costs than benefits and therefore cannot be a mating adaptation, and concluded that A Natural History of Rape was oversimplified, "the worst that evolutionary psychology has to offer", and damaged "both the cause of rape prevention and that of evolutionary psychology."
Publishers Weekly noted that the book had quickly become "highly controversial" and that its authors' claims were "provocative". It questioned Thornhill's suggestion that rape victims of reproductive age "feel worse afterward than older and younger victims", observing, "One wonders how he measured young girls' or older women's pain."
Ward considered the book part of a larger trend toward blaming "objectionable conduct" on a person's genes. Cockburn accused Thornhill and Palmer of ignoring the fact that "every other creature in the world also does its best to procreate and hardly any of them ever mate without the female's consent." She also argued that the book tended to stereotype and defame men, undermining the idea that they should have positions of responsibility. She concluded that its authors should be ashamed of themselves. Pozner wrote that when an excerpt of the book was published in The Sciences it received extensive mainstream media coverage and the book's authors "became highly sought-after media stars." She accused them of promoting "speculative and untestable science" and criticized reporters for failing to "compare Thornhill and Palmer's claims against the exhaustive research conducted on rape victims and rapists over the past 30 years." She cited criticism of Thornhill and Palmer from several authors, and compared A Natural History of Rape to The Bell Curve. Pearcey noted that the book was controversial and described its authors' claim that rape is an adaptation as "inflammatory". Goode wrote that their view that rape is essentially a sexual act and that it may have an evolutionary basis were not novel given the interest in applying Darwin's ideas to "human sexual affairs", though she noted that their recommendations for rape prevention went beyond such familiar claims, and that their work had provoked anger even before its publication due to the appearance of an extract in The Sciences. According to Goode, while several authors had criticized Thornhill and Palmer, Symons considered their view of male sexuality correct.
According to Quinn, A Natural History of Rape was discussed prior to its publication in prominent stories in The New York Times and USA Today, and the controversy surrounding the book encouraged MIT Press to publish it early. Quinn stated that while MIT Press was aware that it would be controversial, they were surprised by "how much the science media picked up on the early excerpt of the book" published in The Sciences, and had expected instead that it would receive attention following a pre-publication piece in Newsweek. Begley wrote that the book was denounced by feminists, sex-crime prosecutors and social scientists "at rallies, on television and in the press" and that the biologist Joan Roughgarden described it as "the latest 'evolution made me do it' excuse for criminal behavior from evolutionary psychologists." She noted that it received criticism from the anthropologist Kim Hill. Ananthaswamy, writing with Kate Douglas, stated that the book "caused public outrage." He quoted the zoologist Tim Birkhead calling the work "morally irresponsible" and argued against Thornhill and Palmer's suggestion that rape is an evolutionary adaptation, writing that, "While one study found that women are 2.5 times more likely to become pregnant after rape than consensual sex, even when accounting for the use of contraception, the idea doesn't account for the rape of men or children."
Scientific and academic journalsEdit
A Natural History of Rape received positive reviews from the psychologist Todd K. Shackelford and Gregory J. LeBlanc in the Journal of Sex Research and R. S. Machalek in Reviews in Anthropology, a mixed review from Daphne Patai in Gender Issues, and negative reviews from the biologists Jerry Coyne and Andrew Berry in Nature, Lisa Sanchez in Gender Issues, the sociologist Hilary Rose in The Lancet, Diane Wolfthal in the Journal of the History of Sexuality, the philosopher Elisabeth Lloyd in Michigan Law Review, the biologist Zuleyma Tang-Martínez and Mindy Mechanic in American Anthropologist, E. M. Dadlez in the Journal of Social Philosophy, and, in Psychology, Evolution & Gender, by M. Suzanne Zeedyk, Lynne Segal, and Jason A. Wheeler Vega. The book was also reviewed by the sexologist Michael C. Seto in Animal Behaviour, Judith B. Greenberg in Science Books & Films, Owen D. Jones in Cornell Law Review, and the anthropologist Jeffrey H. Schwartz in History and Philosophy of the Life Sciences, and discussed by Todd Melby in Contemporary Sexuality, the psychologist Mary P. Koss in Trauma, Violence, & Abuse, Eric Smith and his colleagues in Trends in Ecology & Evolution, Paula Nicolson in Psychology, Evolution & Gender, David Sloan Wilson and his colleagues in Biology and Philosophy, Mary Nell Trautner in Contemporary Sociology, Richard Hamilton in Theory, Culture & Society, H. G. Cocks in Contemporary British History, Griet Vandermassen in Sex Roles, Pratiksha Baxi in Annual Review of Anthropology, and Thornhill and Palmer in Psychology, Evolution & Gender, Evolutionary Psychology, and the Journal of Sex Research.
Shackelford and LeBlanc described the book as an "intellectual masterpiece" that was "courageous, compassionate, and scholarly". They credited its authors with explaining the "basic premises of evolution by natural selection" and exposing misunderstandings of the subject, as well as with providing a clear discussion of the evolution of sex differences, demonstrating that an evolutionary perspective is necessary to understand rape and design effective treatments for its victims and perpetrators, discrediting several hypotheses about the ultimate causes of rape, and providing "a brilliant expose of the power of political and social ideology to obscure, interfere with, and even to halt altogether the scientific search for truth about rape and male sexual coercion." They also credited them with exposing the flaws of the "social science theory of rape", agreeing with them that it involves assumptions about human nature incompatible with modern scientific knowledge, and endorsed their view that the idea that evolutionary psychology excludes "social, cultural, or other environmental influences" is uninformed. They wrote that Thornhill and Palmer's "chapters on treatment, education, prevention, and especially the chapter on psychological pain, reveal a sincere compassion and an urgent sense of care and concern for which Thornhill and Palmer have not been credited in the many misinformed reviews of this book."
Machalek credited Thornhill and Palmer with providing "an excellent introduction to evolutionary theory and its application to human behavior", summarizing data, such as that concerning "the age-distribution of rape victims", that conflicted with explanations of rape derived from the standard social science model, discrediting the idea that biological explanations of human social behavior suffer from the "naturalistic fallacy", and suggesting new policies for preventing rape. Though he wrote that they had a "highly reductionistic account of the nature, causes, and consequences of rape", he still believed that their ideas suggested intriguing and novel hypotheses about rape, and encouraged readers to "reconsider their understanding of this horrific human behavior." He concluded that they "provide reason to hope that we can develop a scientifically based understanding" of rape.
Patai credited the book's authors with challenging the feminist idea that rape is about "violence and power" with "impressive documentation" and with providing "a detailed demonstration of the contradictions and confusions besetting the feminist line on rape", and argued that accusations that they were "blaming the victim" were "hysterical" and ignored what they actually wrote. She believed they discussed MacKinnon's views accurately. However, while she noted that they employed "a large body of evidence of rape in other species and in all human societies", she believed that their work "raises many still unanswered questions", including what motivates rapes of women who are not of reproductive age and rape of men by other men. She considered it unsurprising that their work had received negative reactions characterized by "antagonism and contempt", and suggested that some of them were based in "antagonism toward heterosexuality". She argued that while they might or might not be correct in viewing "reproductive advantage as the ultimate cause of rape ... hostility to their book seems a futile and empty gesture" and that feminists should instead have welcomed a work aimed at preventing rape. She concluded that while they "err in judging rape to be primarily an evolutionary adaptation and not an expression of rage or power, feminists have erred in the opposite direction." However, she also believed that A Natural History of Rape could reinforce "feminist axioms about rape" since Thornhill and Palmer implicitly gave "support to the view that all men are potential rapists."
Coyne and Berry wrote that Thornhill and Palmer's analysis of rape formed the basis for an advocacy of evolutionary psychology. They also described the book as "an inflammatory analysis of a sensitive topic, and a manifesto outlining evolutionary biology's future conquest of the social sciences." They noted that the book had been followed by a controversy in which the scientific evidence for Thornhill and Palmer's views had been largely ignored.
Sanchez compared the book to Rudyard Kipling's Just So Stories (1902) and questioned its scientific status. She considered the work poorly written and poor scholarship and found its approach "reductionist". She criticized Thornhill and Palmer for using studies suggesting that "men rape women that they believe to be fertile" and misusing data to show that reproductive-age rape victims suffer greater psychological trauma than non-reproductive-age rape victims. She believed that their view that rape is a reproductive adaptation is contradicted by the fact that many rapes do not involve ejaculation into the vagina, or are perpetrated on children, elderly women, or men, or involve greater violence than that needed to force copulation. She further argued that they ignored the fact "that it is advantageous for men to support their children long enough for them to reproduce", and that it was doubtful that rape "could be governed by a discrete set of pre-programmed psychological mechanisms specific" to it or understood through comparisons to the behavior of non-human animals, which involved the risk of anthropomorphism. She accused Thornhill and Palmer of lacking "intellectual sophistication" and of being dogmatic in their views, criticized their attitude to feminists, social scientists, rape victims, and women, and their proposals for preventing rape. She called Thornhill and Palmer's "evolutionary vision" a "psychoanalytic nightmare" and concluded that while the attention A Natural History of Rape had received had brought them fame, the book was dangerous.
Rose wrote that the book would inevitably receive attention because of its subject matter. However, she argued that it suffered from conceptual confusion, and that its authors presented inconsistent definitions of rape, one of which, "copulation resisted to the best of the victim's ability unless such resistance would probably result in death or serious injury to the individuals the victim commonly protects", would exclude anal, oral, and same-sex rape. In her view, they failed to explain why some men rape and others do not. She wrote that their "notion that all men are potential rapists only restrained by their self-centred cost-benefit analyses" was "insulting to non-rapist men", and that they, failed "to consider the power of the social and cultural context and the ambiguous messages that it gives about rape", were "male-centred", and showed "little sign of being able to listen to women who have been raped." She criticized their proposals to reduce rape as a form of victim-blaming, accused them of engaging in "grandiose speculation" and "crude generalisations" as well as failing to "understand either the social sciences or modern evolutionary theory", and concluded that A Natural History of Rape was "scientific pornography."
Wolfthal accused the book's authors of claiming that there was a conspiracy to exclude their views from scholarly journals and academic conferences. She dismissed the work, writing that its authors wrongly considered it free from ideological bias, and made many claims, such as that "contemporary Western civilization is more rape-prone than earlier societies and that in the past women married younger, when they were most fertile", without evidence. She accused them of misunderstanding the views of Brownmiller and Griffin, and criticized them for denying that "violence plays any role in motivating rapists", for their "idiosyncratic" definition of rape, for making simplistic assumptions such as that "men and women are heterosexual and constructed as binary opposites" and that men are more aggressive and eager to copulate than women, for overstating the role of competition as a driving force, and for failing to consider how changes in modern society, such as the feminist movement, might affect the "dynamics of rape." She rejected their proposals for preventing rape, arguing that women living in western societies would not find them acceptable, and concluded that their work contributed nothing to the understanding of rape.
Lloyd wrote that the book had received significant media attention. However, she questioned Thornhill and Palmer's understanding of evolutionary theory, arguing that they attached undue importance to natural selection and ignored other evolutionary forces. She criticized them for maintaining that "rape behavior constitutes a single, genuine trait", failing to provide evidence for the "relative reproductive success of rapists and nonrapists", dismissing the view that rape results from psychopathology, failed to consider data drawn from comparisons between humans and chimpanzees and bonobos or to provide a detailed description of "circumstances in our evolutionary past", caricatured the views of social scientists, and misrepresented Brownmiller. She argued that that failed to show that rape is an adaptation and questioned their proposals for preventing rape.
Tang-Martínez and Mechanic praised aspects of Thornhill and Palmer's discussions of evolutionary theory and sexual selection. However, they criticized them for maintaining that all human experiences are the result of natural selection, that behavioral differences between men and women are the result of sexual selection, that there is a biological basis to men's tendency toward sexual promiscuity, and that rape is both a "human universal" and found in many animal species. They also argued that they held inconsistent views about whether rape remains an adaptive reproductive strategy and failed to demonstrate the existence of "human traits specialized for rape", and noted that while they argued that the Oedipus complex is an evolutionary impossibility because of the effects of inbreeding depression, they failed to discuss "incestuous rapes by fathers and other relatives that could also result in inbreeding depression." They wrote that their argument that "women who suffer more violent rapes are less traumatized because their injuries are evidence to spouse and kin that they resisted" was contradicted by evidence from rape trauma specialists, that they tried to defend their views by minimizing the frequency of rapes of prepubertal girls, failed to accept that rapes committed by men of high social status contradicts their view that men who have no access to resources and were unable to attract women are most likely to rape, ignored rapes that involved anal or oral sex, homosexual acts, or murder, and dismissed or caricatured the views of their opponents, or attributed political motives to them.
Dadlez wrote that Thornhill and Palmer's suggestion that rape is an adaptation received worldwide attention. However, he believed that they failed to present necessary evidence about the human evolutionary past and the relevance of rape to reproductive success, and noted that many rapes cannot result in reproduction, since they were committed against girls or women not of childbearing age, or involved homosexual acts or oral or anal sex. He also argued that they made sufficient use of primate studies, that evidence conflicts with the idea that rape is an adaptation, and that their alternative suggestion that rape might be a byproduct of other adaptations was trivial. He questioned their claim that rape is primarily sexually motivated and their use of evidence from animal studies, arguing that their approach risked anthropomorphism and that their use of the term "rape" to describe behavior in non-human animals was questionable. He rejected their claim that there are no rape-free societies and their claim that the psychological trauma that can result from rape is an adaptation that helps protect women from rape. He also criticized their proposals for preventing rape and argued that they wrongly dismissed those holding different views as lacking in objectivity while presenting themselves as entirely objective. He believed that despite their intentions they were likely to be misread as providing excuses for rapists.
Zeedyk observed that the book had received much attention and been endorsed by evolutionary psychologists Steven Pinker and David C. Geary. She rejected its authors' views about how to eradicate rape. She argued that their claims about women's responses to being raped conflicted with women's experience and were based on unsound methods. She rejected their argument that rape is sexually motivated, arguing that from the perspective of a raped woman, there is no distinction between the tactic employed in rape, violence, and the motivation for rape. She also criticized their distinction between "instrumental force and excessive force", arguing that it ignored the victim's perspective. She also argued that they ignored evidence that substantiated the social science account of rape. She criticized them for ignoring forms of violence against women other than rape, and argued that their conception of science was mistaken and that their proposal for preventing rape by informing young men about its legal penalties ignored the fact that "recorded rapes typically fail to come to prosecution" and was more likely to encourage than discourage rape. Nevertheless, she considered A Natural History of Rape important because it was "a good example of contemporary evolutionary psychology". She suggested that an alternative evolutionary approach to rape might focus on men's "innate drive for power".
Segal noted that the book had received media attention and wrote that it was part of a trend to blame social problems on biological factors. She dismissed the work as pseudoscience and described its authors' assertion that rape is about sex rather than violence as a half-truth. She criticized them for suggesting that "human males will rape when their capacity to reproduce successfully is thwarted", basing claims about human behavior on the study of non-human animals such as insects, falsely characterizing their critics as "anti-evolution", holding that certain aspects of "human sexual conduct" are "universally dimorphic" between the sexes, and favoring biological rather than social explanations of the differences that existed. She wrote that, "Talk of ‘natural selection’ in the arena of sexual activity is nothing more than empty speculation without evidence of the evolutionary history of any particular attribute." She criticized Thornhill and Palmer for maintaining that infertile women suffer "less psychological pain" from rape, writing that it ignored what was known about the destructive effects of child sexual abuse. She criticized their proposals for preventing rape and concluded that A Natural History of Rape should be treated with derision.
Wheeler Vega wrote that the book had worsened relations between biological scientists and feminists. Though he supported its' goal of eradicating rape, he faulted its authors for their criticism of social science, postmodernism, and feminist explanations of rape. He argued that their discussion of issues such as mind–body dualism showed that they had an "unsophisticated metaphysics" and sought to attribute crude mistakes to authors they criticized. He criticized their treatment of the "naturalistic fallacy", suggesting that they oversimplified the issue and had misappropriated the term from Moore, who used it to refer to "the error of using some single property as a definition of ‘good’", with naturalness being only one possible example of such a property. He also criticized their discussion of the issue of whether forced copulation in animals should be considered rape.
Melby, writing before the book's publication, noted that it was already "drawing widespread criticism" and that it had been criticized by Brownmiller. Smith and his co-authors noted that Thornhill and Palmer's work was surrounded by controversy and had received "sensationalized press coverage". Distancing themselves from such reactions, they wrote that the primary scientific weaknesses of the work were its authors' "lack of explicit models or fitness measures" and "appeal to hypothetical domain-specific evolved psychological mechanisms." They added that effective evaluation of their hypothesis required "specification of an evolutionary model, and estimates of the fitness costs and benefits of rape." Employing a fitness cost/benefit mathematical model based on studies of the Aché people in Paraguay, they argued that the costs of tribal rape significantly outweighed its benefits, making it unlikely that rape was an adaptation. Nicolson described the book and the responses to it, both critical and supportive, as part of a necessary debate.
Wilson and his co-authors argued that Thornhill and Palmer use the "naturalistic fallacy" inappropriately to forestall legitimate discussion about the ethical implications of their theory. They pointed out that combining a factual statement with an ethical statement to derive an ethical conclusion is standard ethical reasoning, not a naturalistic fallacy, because the moral judgment is not deduced exclusively from the factual statement. They further argued that if one combines Thornhill and Palmer's factual premise that rape increases the fitness of a woman's offspring with the ethical premise that it is right to increase the fitness of offspring, the resulting deductively valid conclusion is that rape also has positive effects and that its ethical status is ambiguous. They stated that Thornhill and Palmer dismiss all ethical objections with the phrase 'naturalistic fallacy' although "it is Thornhill and Palmer who are thinking fallaciously by using the naturalistic fallacy in this way." Hamilton criticized Thornhill and Palmer's definition of rape as the coerced vaginal penetration of women of reproductive age, suggesting that the exclusion of homosexual rape, rape of women outside the reproductive age range, murderous rape, and non-vaginal forms of rape virtually guaranteed the confirmation of their hypothesis that rape is an evolved reproductive strategy and not a crime of violence.
Palmer and Thornhill, writing in Evolutionary Psychology, responded to criticism of their work from Michael Kimmel. Writing in the Journal of Sex Research, they argued that much of the criticism their work had received consisted of straw man arguments that were "inherently contradictory and illogical" or which misunderstood or misrepresented their views. According to them, these false claims included the suggestion that their work was "an example of facile enthusiasm for adaptationist explanations of evolutionary phenomena" and that they forced their data to support their conclusions. In reply to these critics they pointed out that the hypothesis that rape is an adaptive strategy was only one of two possible explanations for rape they considered in their work, the other being that rape is "a by-product of differences in male and female sexualities." They wrote that they themselves made some of the same points that their critics used to try to discredit their work, such as de Waal's point that masturbation helps to show that many common behaviors are simply by-products of the adaptations governing male sexual desires rather than being adaptations themselves. They questioned Smith's claim that ethnographic evidence demonstrates that the overall reproductive costs of rape are higher than its benefits and wrote that Smim′s argument "actually implies a lower standard for identifying adaptation than the one we used in our book" and "implies that rape could be considered an adaptation if its current reproductive benefits outweigh its cost to reproductive success." They also noted that several authors had supported their views, and responded to criticism of their work from Angier.
Evaluations in booksEdit
The psychologist Margo Wilson credited Thornhill and Palmer with being aware of women's feelings about rape and with wanting to benefit women in the foreword to A Natural History of Rape. She believed that they offered "many novel and nonintuitive insights about why rape occurs and why women are so devastated by the victimization." The sociologist Hilary Rose and the biologist Steven Rose called A Natural History of Rape, "perhaps the nadir of evolutionary psychology's speculative fantasies" in their anthology Alas, Poor Darwin (2000). They wrote that its authors described forced sex among animals as rape despite the fact that leading journals of animal behavior had rejected that characterization as a form of anthropomorphism as long ago as the 1980s and failed to address evidence showing that while forced sex among animals always takes place with fertile females, human rape victims are often either too young or too old to be fertile. The Roses also accused them of insulting rape victims by suggesting that they might have invited sex by wearing revealing clothing, and criticized them for preferring ultimate to proximate explanations, considering the latter to be more explanatory. The Roses suggested that they underestimated the incidence of rape, and wrote that their ideas were "offensive both to women and also to the project of building a culture which rejects rape." Richard Morris stated that A Natural History of Rape caused "a great deal of controversy" and that some critics objected "quite violently" to its authors' ideas in The Evolutionists (2001). He considered it unfortunate that the controversy obscured the fact that their work was not only about rape, but was also a defense of evolutionary psychology.
Pinker described A Natural History of Rape as among the most "incendiary" books of recent years in The Blank Slate (2002). He compared it to Herrnstein and Murray's The Bell Curve (1994) and the psychologist Judith Rich Harris's The Nurture Assumption (1998). He credited its authors with bringing attention to scientific research on rape and its connection with human nature, but observed that they also "brought down more condemnation on evolutionary psychology than any issue had in years". According to Pinker, they had been attacked by both the political left and the political right, for acknowledging biological influences on human behavior. This included a Feminist Majority Foundation spokesperson calling A Natural History of Rape "scary" and "regressive" and a spokesperson for the creationist Discovery Institute testifying at a U. S. congressional hearing that it was a threat to morality. Pinker agreed with Thornhill and Palmer that rape is sexually motivated. However, he criticized them for establishing a dichotomy between the suggestion that rape is an adaptation and the suggestion that rape is a byproduct of the human willingness to use violence, writing that this diverted attention from the more basic claim that rape is related to sex. He considered their proposals for preventing rape untested and questionable, but added that critics reacted to the proposals with unjustified outrage.
The sociologist Michael Kimmel criticized Thornhill and Palmer's argument that female rape victims tend to be sexually attractive young women, rather than children or older women, contrary to what would be expected if rapists selected victims based on inability to resist, in the anthology Evolution, Gender, and Rape (2003). He argued that younger women are the least likely to be married and the most likely to be out on dates with men, and therefore are the most likely to be raped because of opportunity arising from social exposure and marital status. The bioethicist Alice Dreger wrote in Galileo's Middle Finger (2015) that Palmer showed her that most of the criticisms directed against A Natural History of Rape attributed "ignorant and obnoxious" views to its authors that they had never expressed, such as that rape is normal and that men cannot help raping.
Thornhill debated his and Palmer's conclusions about rape with Brownmiller on American public radio.
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