The idea that it is funny to see wild animals coerced into acting like clumsy humans, or thrilling to see powerful beasts reduced to cringing cowards by a whip-cracking trainer, is primitive and medieval. It stems from the old idea that we are superior to other species and have the right to hold dominion over them.

The city is not a concrete jungle, it is a human zoo.

We may prefer to think of ourselves as fallen angels, but in reality we are rising apes.

In a social environment that is ever crowded and impersonal, it is becoming increasingly important to reconsider the value of close personal relationships before we are driven to ask the forlorn question, 'Whatever happened to love?'

It is interesting that amongst children of preschool age, the more intelligent ones tend to sleep less than the dull ones. After the age of seven this relationship is reversed, the more intelligent schoolchildren sleeping more than the dull ones.

Artists like cats; soldiers like dogs.

...In little more than a single century from 1820 to 19450, no less than fifty-nine million human animals were killed in inter-group clashes of one sort or another.... We describe these killings as men behaving "like animals," but if we could find a wild animal that showed signs of acting this way, it would be more precise to describe it as behaving like men.