"The authority of science … promotes and encourages the activity of observing, comparing, measuring and ordering the physical characteristics of human bodies.… Cartesian epistemology and classical ideals produced forms of rationality, scientificity and objectivity that, though efficacious in the quest for truth and knowledge, prohibited the intelligibility and legitimacy of black equality…. In fact, to "think" such an idea was to be deemed irrational, barbaric or mad."