Greek pederasty, as idealised by the Greeks from archaic times onward, was a relationship and bond between an adolescent boy and an adult man outside of his immediate family, and was constructed initially as an aristocratic moral and educational institution. As such, it was seen by the Greeks as an essential element in their culture from the time of Homer onwards.The ancient Greeks were the first to describe, study, systematize, and establish pederasty as an institution. The origin of that tradition has been variously explained. One school of thought, articulated by Bernard Sergent, holds that the Greek pederastic model evolved from far older Indo-European rites of passage, which were grounded in a shamanic tradition with roots in the Neolithic.Foucault declared that pederasty was "problematized" in Greek culture, that it was "the object of a special — and especially intense — moral preoccupation" focusing on concern with the chastity/moderation of the erōmenos (the term used for the "beloved" youth).