Human beings place their desires ahead of the collective good.

When resources become skimpy, human beings don't suddenly cooperate to conserve what's left. They fight to the last scrap for possession of a diminishing resource.

From a scientist's perspective, to understand everything that you need to know about human beings, you only have to tinker with all the mechanical parts of genes and the brain until there are no more secrets left.

Human beings are very complex creatures. This desire, this greed, this love is very complex.

Zoo: An excellent place to study the habits of human beings.

For thousands of years, human beings have been obsessed with beauty, truth, love, honor, altruism, courage, social relationships, art, and God. They all go together as subjective experiences, and it's a straw man to set God up as the delusion. If he is, then so is truth itself or beauty itself.