The important point is that since the origin of life belongs in the category of at-least-once phenomena, time is on its side. However improbable we regard this event, or any of the steps which it involves, given enough time it will almost certainly happen at least once. And for life as we know it, with its capacity for growth and reproduction, once may be enough.

So-called defense now absorbs sixty per cent of the national budget, and about twelve per cent of the Gross National Product.

A peacetime draft is the most un-American thing I know.

About two million years ago, man appeared. He has become the dominant species on the earth. All other living things, animal and plant, live by his sufferance. He is the custodian of life on earth, and in the solar system. It's a big responsibility.

Nuclear weapons offer us nothing but a balance of terror, and a balance of terror is still terror.

I think I know what is bothering the students. I think that what we are up against is a generation that is by no means sure that it has a future.

The thought that we're in competition with Russians or with Chinese is all a mistake, and trivial. We are one species, with a world to win.