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.

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

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

Could people be trained to be less gullible? Or are you as stuck with gullibility as you are with skin colour?

Anyone who has ever had the feeling of being higher than a kite after giving a public speech is well aware of the effects of attention.

Successful cult memes induce intense social interaction behaviour between cult members. This trips the attention detectors.

Fighting hard to protect yourself and your relatives is good for your genes, but when captured and escape is not possible, giving up short of dying and making the best you can of the new situation is also good for your genes.