Cults, or related social movements such as the Taliban in Afghanistan, result in massive military expenses.

Most of the suicide hijackers came from Saudi Arabia, a place not lacking in wealth. But due to rapid population growth, the wealth per capita has fallen by about half in a generation.

Brigham Young had 47 children, and over 50 women as wives.

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

Primates will continue to play social games without the least insight into what is killing them.

Evolution acts slowly. Our psychological characteristics today are those that promoted reproductive success in the ancestral environmen.

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.