We are born of risen apes, not fallen angels.

Natural selection deals ruthlessly with any population, bird or beaver, which fails to solve the problems of its environment with all those resources, learned or unlearned, which may be at its disposal.

What could not be denied was that in vast segments of the animal world natural selection of the most qualified individuals took place not by competition for females but by competition for space.

What truly leads the evolutionary procession, in other words, is behavior.

For the soundest of evolutionary reasons man appears at his best when times are worst.

If you watch lizards and lions copulating, then you will see that in 200 million years the male has not had a single new idea.

The city is a cultural invention enforcing on the citizen knowledge of his own nature. And this we do not like. That we are aggressive beings, easily given to violence; that we get along together because we must more than because we want to, and that the brotherhood of man is about as far from reality today as it was two thousand years ago; that reason's realm is small; that we never have been and never shall be created equal; that if the human being is perfectible, he has so far exhibited few symptoms - all are considerations of man from which space tends to protect us.