The information that is passed from person to person and from generation to generation is the primary factor that gives humans a competitive advantage over other animals.

Some people recovering from drugs or alcohol stay with the programs indefinitely, making the recovery program their family, a long-term source of attention rewards.

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

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

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.

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

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