“Apes have a wide variety of sexual arrangements. That means, by the way, that there is no such thing as an ape legacy that humans are doomed to live by.”

“Even evolutionary explanations of the traditional division of labor by sex do not imply that it is unchangeable, natural in the sense of good, or something that should be forced on individual women...”

“As technology accumulates and people in more parts of the planet become interdependent, the hatred between them tends to decrease, for the simple reason that you can't kill someone and trade with h...”

“Instead of asking, Why is there war? we might ask, Why is there peace? We can obsess not just over what we have been doing wrong but also over what we have been doing right. Because we have been do...”

“The main reason that violence correlates with low socioeconomic status today is that the elites and the middle class pursue justice with the legal system while the lower classes resort to what scho...”

“Friendship, like other kinds of altruism, is vulnerable to cheaters, and we have a special name for them: fair-weather friends. These sham friends reap the benefits of associating with a valuable p...”

“Its unthinkable, now to live as her parents had done, going to work from nine to five and enjoying the benefits of the newly-formed health and education services. What paradise it had seemed! Now, ...”

“Work indeed has many more benefits than money.”

“Criticism addressed to a person can only be of benefit if it was said in the right way and at the right time.”

“In a dog's life, some plaster would fall, some cushions would open, some rugs would shred. Like any relationship, this one had its costs. They were costs we came to accept and balance against the j...”

“In the lean approach, companies are taught that prices are set by the market and that one way to improve profit margin is to reduce costs. This thinking flies in the face of "cost plus" thinking, w...”

“Medical costs are of concern, both in developing and developed countries.”