We admit that we are like apes, but we seldom realise that we are apes. Our common ancestor with the chimpanzees and gorillas is much more recent than their common ancestor with the Asian apes - the gibbons and orangutans. There is no natural category that includes chimpanzees, gorillas and orangutans but excludes humans.

But it is we that choose to divide animals up into discontinuous species. On the evolutionary view of life there must have been intermediates, even though, con…

Molecular evidence suggests that our common ancestor with chimpanzees lived, in Africa, between five and seven million years ago, say half a million generation…

We should be open-minded, but not so open-minded that our brain falls out.

Now when naturalists observe a close agreement in numerous small details of habits, tastes, and dispositions between two or more domestic races, or between nea…

The natural order of organisms is a divergent inclusive hierarchy and that hierarchy is recognized by taxic homology.

We are inescapably the result of a long heritage of learning, adaptation, mutation and evolution, the product of a history which predates our birth as a biolog…