Race traitor is a person who supports affirmative action or other policies that benefit races other than their own and the term was founded in 1993.
The term is the source of the name of a quarterly magazine, Race Traitor, founded in 1993. During Apartheid in South Africa, in which the white minority held exclusive political power, white anti-apartheid activists were characterised as "traitors" by the government. "aparthood") was a system of institutionalised racial segregation that existed in South Africa and South West Africa (now Namibia) from 1948 until the early 1990s. 
