“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...”

“The kingdoms of kings are confined, either by mountains or rivers, or by a change in customs or by a difference of language; but my kingdom is as great as the world, because I am neither Italian, n...”

“Still, for long the love of science triumphed over all other feelings. He became an artist deeply impressed by the marvels of art, a philosopher to whom no one of the higher sciences was unknown, a...”

“John Muir, Earth planet, Un”

“work at our responsibility as parents as if everything in life counted on it, because in fact everything in life does count on it.”

“Happiness [is] only real when shared”

“That's what people do who love you. They put their arms around you and love you when you're not so lovable.”

“No matter the languages we speak or the colour of our skin, we share ancestors who planted rice on the banks of the Yangtze, who first domesticated horses on the steppes of the Ukraine, who hunted ...”

“There is only one Human race but many nations with diverse tribes.”

“There spoke the race!" he said; "always ready to claim what it hasn't got, and mistake its ounce of brass filings for a ton of gold-dust. You have a mongrel perception of humor, nothing more; a mul...”