Nature vs. Nurture?
In the longstanding battle between nature and nurture, nurture takes a hit with this article. If everyone in your family behaves a certain way, is it because they learned it from one another, or because they all have a similar genetic peculiarity? In this case, all of the men in the family who have the same defect on the X chromosome results in an MAOA deficiency, which in turn seems to lower IQ and increase aggression. (The women who carry it have a second X chromosome to balance things out.) Still, it's controversial, since it's all one family. Of course they could've just learned these aggressive behaviors from one another. There's a basic problem in that our starting assumption is that all men are created equal and that given the right environment, any one of us could rise to greatness. But is it true? What happens if we have to abandon that assumption? So many questions flow from there.