If you mean by capitalism the God-given right of a few big corporations to make all the decisions that will affect millions of workers and consumers and to exclude everyone else from discussing and examining those decisions, then the unions are threatening capitalism.

Of the many things we have done to democracy in the past, the worst has been the indignity of taking it for granted.

Every step by which men add to their knowledge and skills is a step also by which they can control other men.

You may call for peace as loudly as you wish, but where there is no brotherhood there can in the end be no peace.

Science itself is a humanist in the sense that it doesn't discriminate between human beings, but it is also morally neutral. It is no better or worse than the ethos with and for which it is used.

I have a simple principle for the conduct of life- never to resist an adequate temptation.

There are some who become spies for money, or out of vanity and megalomania, or out of ambition, or out of a desire for thrills. But the malady of our time is of those who become spies out of idealism.