So far, we have been able to study only one evolving system and we cannot wait for interstellar flight to provide us with a second. If we want to discover generalizations about evolving systems, we will have to look at artificial ones.

It is an occupational risk of biologists to claim, towards the end of their careers, that the problems which they have not solved are insoluble.

You couldn't have human society without language.

Mathematics without natural history is sterile, but natural history without mathematics is muddled.

Genetics is about how information is stored and transmitted between generations.

I can't go around believing in a God that believes suffering is good for me.

Societies depend on agreed rules.