Children do not have to learn that streets are dangerous places by potentially fatal trial and error.

High status males had multiple wives or additional mating opportunities in the ancestral environment.

People repeat behaviour that leads to flooding their brains with pleasurable chemicals. The short-term reward loop acts over hours to years, and the long-term reproductive success loop over generations.

People can undergo a sudden change of thinking and loyalties under threat of death or intense social pressure and isolation from friends and family.

Even small cults are a serious cost on the world economy, to victims, their families, employers, friends, and credit-card companies.

Genetic studies in Iceland have found that many of the women who were the founding stock of Iceland came from England and what is now France. Some were probably captured and carried off in Viking raids only 40 generations ago.

Action leads to Attention. that in the short-term releases Rewarding brain chemicals and in the long term improves reproductive success.