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According to modern views on human bio-sociality, Big Five personality traits have been shaped in the process of human evolution and their expression is an outcome of the complex interaction of prenatal predispositions and cultural environment. Present study investigates the impact of prenatal androgenization and cultural norms on the personality traits in adult men from four ethnic groups living on the territory of Russian Federation. The study was conducted on 263 young men (age range 17–30 years), including Russians, Armenians, ObUgric and Buryats. The results revealed significant population differences in 2D:4D ratios on both hands, with lowest ratios for Asian sample, increasing in populations to the West. Significant ethnic differences were found for Openness to New Experience, Conscientiousness, and Neuroticism. Positive association between 2D:4D ratios on the right hand and Agreeableness in men with no respect to population origin was detected. This relationship becomes stronger, when controlling for aggressiveness. Rostovtseva et al. / 2d:4d, Big Fives and Aggression in Young Men 111

2d:4d, Big Fives and Aggression in Young Men of Caucasian, Ural and Asian Origin