Why are warriors capable of working together, although they like fighting with each other?

Men have a long history of fighting with one another for dominance, but why such duels did not leave tribal unity in tatters and warriors less capable of working together to fend off attacks from predators and hostile clans remains a mystery. One common theory is that men more readily make up after fierce physical conflicts than do women. And an experiment run recently at Harvard University suggests this may be true.

In "The Dream of Enlightenment", Anthony Gottlieb focuses on some of the great Enlightenment thinkers. He offers engaging summaries of their main ideas and choice details of their lives. They were freelance philosophers working independently of the universities, criticizing mainstream views and liberating thought from its academic straitjacket and neo-Aristotelian dogmatism.