Warriors and Worriers

<p>The question of exactly what sex differences exist and whether they have a biological foundation has been one of our culture's favorite enduring discussions. It should. After a baby is born a parent's first concern is for its physical health. The next concern is its sex. Only in the most modern societies does sex not virtually guarantee the type of future life a new human being will have. Even in modern societies one's sex usually plays a large role in the path a life follows.</p>