... the fouling of the nest which has been typical of man's activity in the past on a local scale now seems to be extending to the whole world society.

Because of his capacity for abstract communications and language and his ability to enter in imagination into the lives of others, man is able to build organizations of a size and complexity far beyond those of the lower animals.

If we saw tomorrow's newspaper today, tomorrow would never happen.

Anyone who believes exponential growth can go on forever in a finite world is either a madman or an economist.

Are we to regard the world of nature simply as a storehouse to be robbed for the immediate benefit of man?

The only religion that still demands human sacrifice is nationalism.

Communication can only take place among equals.