The evidence is due to opportunity. It's like in nature. A wolf pack or lion pride with overabundance will gorge unnecessarily, even though they're far exceeding their needs, and meat will go to waste. In leaner hunting situations, this will not be the case. "Inherent malignancy" or "inherent nature" on a racial level of that sort is indefensible. Human "races" are, at the core of things, just like cat, horse, cow, or dog breeds, in that humans are polymorphic species (maybe not as extreme in physical difference or attitude as dog breeds, but they are the most diverse of the polymorphic species), but instead of our breeds being differentiating by domestication needs, they became so by adaptation to different climate and physical environs during prehistoric migrations. The point is, racial traits have NO impact, as an inherent quality by nature on behaviours and thought patterns that would not have yet been conceived or relevant in the migration period.