As a group, anthropologists are not too fond of people who work in the business world.

Romantic love is an addiction.

At first I assumed hate was the opposite of love. But it isn't. The opposite of love is indifference.

Until recently, we regarded love as supernatural. We were willing to study the brain chemistry of fear and depression and anger but not love.

The main characteristics of romantic love are craving: an intense craving to be with a particular person, not just sexually, but emotionally.

A Rolex watch or an expensive car are the things guys often use to show status, wealth, and basic desirability.

From my studies of genetics and neuroscience I have come to believe that people fall into four broad personality types - each influenced by a different brain chemical: I call them the Explorer, Builder, Director, and Negotiator.