...But testosterone not only helps to build the male brain, it also plays a key role in activating it. In one experiment, researchers followed 17 male City traders and found that when they had high morning levels of testosterone they made greater profits for the rest of that day. They reasoned that this could be because higher testosterone increases the appetite for risk - a phenomenon that could be extremely dangerous in certain market conditions...
...The problem is that the market became too primal, too dominated by men and their baser instincts, too preoccupied with greed and too little with the consequences. But have I not implied that this is unalterable and that men are slaves to their impulses? Well, no. I did not suggest that culture and ethics are impotent, merely that they are rarely sufficient to eradicate the evolved differences between men and women. Take physical aggression. Although absolute levels of aggression vary from nation to nation, the difference between male and female aggression is pretty consistent (the ratio of men's to women's same-sex murders, for example, is remarkably constant at about 10-1)...
