One possibility appears to have been neglected, though. When we look at the conventional catalogue of differences between men and women, we find that men are assumed to have characteristics remarkably similar to the characteristics of people with brain injury.
On the whole, men are more violent than women and more likely to express anger. They are more likely to be restless and impatient. They have been shown to have poorer verbal abilities than women. They are often assumed to have difficulties with attention (being unable to find things which are in plain view, for example) and with memory (as when they forget important anniversaries). They are often assumed to be more egocentric and impulsive.
All these characteristics are associated with brain injury. Men are twice as likely as women to be diagnosed with traumatic brain injury, and most victims are young men aged 15 to 30. Young men are more likely than young women to take dangerous risks and to suffer head injury as a result. These figures, of course, apply only to diagnosed brain injuries, injuries which at the very least have resulted in loss of consciousness, loss of memory, alteration of mental state, or neurological deficit – that is, injuries other people notice and arrange to have treated in hospital.
However, men are also more likely to suffer concussion which, although it usually does not have the catastrophic consequences of more serious brain injury, still has some pretty serious ones. "Repeated concussions," note Kelly, Nichols, Filey, Lillehei, Rubinstein and Kleinschmidt-Demasters in an article published in JAMA in 1991 (vol. 266, no. 20, pp. 2867-2869), "can lead to brain atrophy and cumulative neuropsychological deficits."
As children we often hit our heads without the idea crossing anyone's mind that we should undergo a neurological examination. Boys are more likely to hit their heads. As boys grow older they take part in contact sports. Kelly et al. reported that in 1991 football was producing an estimated 250,000 concussions every football season in the United States, and that 20% of high school football players in the United States suffered at least one concussion every season. The probability that at least some of the behavioural difference between men and women can be explained as a result of brain trauma seems fairly high.
History confirms the thesis. The behavioural differences between men and women are less marked than in the past, and society is less violent and less dangerous. Until fairly recently, for example, a large part of the male population spent much of its time working in dangerous occupations without head protection; one of these occupations was war, in which men often found themselves fighting hand to hand in conditions likely to lead to brain injury. Today, of course, jobs are less dangerous, workers wear head protection, and war is fought with weapons which act from a distance. As the likelihood of brain injury has decreased, so have the behavioural differences between men and women.
In North America, contemporary worship of sport threatens to widen the gap again. The most popular sport in the United States is football, while in Canada it is hockey. Both sports inflict head injury at a high rate, and both are played primarily by men. Women's hockey is popular, but the women's game is less violent (bodychecking is prohibited) and far fewer women than men play hockey. The fanatical devotion of young boys to these sports seems likely to create a more "masculine" generation.
In the end, then, the behavioural differences between men and women may not be due to hormones, the worldwide male conspiracy, or, as women seem commonly to suppose, men's inherent moral and intellectual inadequacy. They may after all be due to sexist childrearing, but not in the way people thought in the 1960s and 1970s. That is, the problem may not be that girls are trained to act in submissive ways, but rather that boys are encouraged to act in ways which endanger their physical, emotional, and intellectual function.
The question remains of how we are to eliminate this sexism. Well, one thing that would help would be for young women to stop encouraging young men in this behaviour. Young women reward football players, hockey players, motorcyclists, and so on. They reward the recklessness which produces brain injury. Another big help would be for schools, including our institutions of higher learning, to stop promoting sports which produce brain injury. Movies and television will have to stop promoting the invulnerable action hero as the model of masculine behaviour.
Okay, I knew it was too much to ask. We won't act on this problem, even though action, even if it didn't eliminate differences between the sexes, would reduce the horrible toll exacted by brain injury among both men and women. The opportunity for each of the sexes to feel superior to the other would be reduced, opportunities for profit would be reduced, and we couldn't have that. What was I thinking?
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