The order of humanity, best 2 worst.

White male
Asian female
White female
Native American male
Asian male
Arab male
Arab female
Native american female
Black female
Black male

Several hypotheses have been proposed to explain why average IQ varies among racial-ethnic groups. Certain environmental factors, such as nutrition, are thought to modulate IQ in children,[7] and other influences have been hypothesized, including education level, richness of the early home environment, and other social, cultural, or economic factors. The primary focus of the scientific debate is whether group IQ differences also reflect a genetic component. Hereditarianism hypothesizes that a genetic contribution to intelligence could include genes linked to neuron structure or function, brain size or metabolism, or other physiological differences which could vary with biogeographic ancestry.

The truth is that we cant find a causal link between inteligents and genetic heredity....its most likely caused by lack of nutrition and environmental factors.