“Jimmy, look at it realistically. You can't couple a minimum access to food with an expanding population indefinitely. Homo sapiens doesn't seem to be able to cut himself off at the supply end. He's one of the few species that doesn't limit reproduction in the face of dwindling resources. In other words - and up to a point, of course - the less we eat, the more we fuck."

"How to do you account for that?" said Jimmy

"Imagination," said Crake. "Men can imagine their own deaths...human beings hope they can stick their souls into someone else...and live on forever.”