In hindsight it may even seem inevitable that a socialist society will starve when it runs out of capitalists.

In a collaboration, each author will do 75% of the work.

The perversity of the Universe tends towards a maximum.

And every friend I've got has been writing Mars stories. It was pretty clear I'd never catch up.

A civilization has the ethics it can afford

The human species really could have faced global thermonuclear war. During seventy years of Cold War we grew used to it.

My problem with new writers is that it takes me five or six years to memorise the right names.