That left 95% of the variation to be explained by the effects of culture and individual decisions. But, while the effects of biology on the traits that we measured are relatively small for humans living in complex modern cultures, even small effects, when repeated consistently, will accumulate.
当我们估算一个人体内发生的变异有多少是来自于生物因素的时候，答案可能是小于5%。这意味着95%的变异都来自于文化的影响和个人选择。但对于生存于如此一个复杂现代文化中的人们来说，生物因素对某些特性的影响虽然微小，但在长期重复和积累之后必将最终显现出来。