Sri Lankan Tamil nationalism is the conviction of the Sri Lankan Tamil people, a minority ethnic group in the South Asian island country of Sri Lanka (formerly known as Ceylon), that they have the right to constitute an independent or autonomous political community. This idea has not always existed. Sri Lankan Tamil national awareness began during the era of British rule during the 18th century, as Tamil Hindu revivalists tried to counter Protestant missionary activity. The revivalists, led by Arumuga Navalar, used literacy as a tool to spread Hinduism and its principles. The reformed legislative council, introduced in 1921 by the British, was based on principles of communal representation, which led the Tamils to realize that they were the minority ethnic group and that they should be represented by a member of their own community. It was under this communal representation that Tamil national awareness changed to national consciousness—a less passive state. They formed a Tamil political party called the All Ceylon Tamil Congress (ACTC). In the years leading to Sri Lankan independence, political tension began to develop between the majority Sinhalese and minority Tamil communities as the ACTC, citing the possibility of the majority Sinhalese adopting a dominant posture, pushed for “fifty-fifty” representation in parliament. This policy would allot half the seats in parliament to the Sinhalese majority and half to the minority communities: the Muslims, the Tamils and the Indian Tamils.
After Sri Lanka achieved independence in 1948, the ACTC decided to merge with the ruling United National Party (UNP). This move was not supported by half of the ACTC members and resulted in a split—one half of the party decided to merge with the UNP and the other half decided to leave the party altogether, forming a new Tamil party in 1949, the Federal party. Policies adopted by successive Sinhalese governments, and the 1956 success of the Sinhala Nationalist government under Solomon Bandaranaike, made the Federal Party the main voice of Tamil politics. Increased racial and political tension between the two communities led to the merger of all Tamil political parties into the Tamil United Liberation Front. This was followed by the emergence of a militant, armed form of Tamil nationalism.