For all the tribulations in our lives, for all the troubles that remain in the world, the decline of violence is an accomplishment that we can savor - and an impetus to cherish the forces of civilization and enlightenment that made it possible.

An ideology can provide a satisfying narrative that explains chaotic events and collective misfortunes in a way that flatters the virtue and competence of believers, while being vague or conspiratorial enough to withstand skeptical scrutiny.

There has to be innate circuitry that does the learning, that creates the culture, that acquires the culture, and that responds to socialization.

We can shape events in each other's brains with exquisite precision.

Probably Hobbes got it right when he said that a leviathan, a third party with a monopoly on the use of legitimate use of force in a territory, might be among the biggest violence reduction techniques ever invented.

The problem with the emotions is not that they are untamed forces or vestiges of our animal past; it is that they were designed to propagate copies of the genes that built them rather than to promote happiness, wisdom, or moral values.

Many artists and scholars have pointed out that ultimately art depends on human nature.