question: Why were some political commentaries attempting to attach natural selection to human races ?
answer: to provide scientific evidence for the superiority of Caucasians over non white races and justify European imperialism
turker_answer: Some political commentaries are attempting to attach natural selection to human races in order to provide scientific evidence for the superiority of Caucasians over non white races and justify European imperialism .
rule-based: Some political commentaries attempting to attach natural selection to human races were to provide scientific evidence for the superiority of Caucasians over non white races and justify European imperialism .