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

The way to prevent war is to bend every energy toward preventing it, not to proceed by the dubious indirection of preparing for it.

Principles-and I have in mind such principles as states' rights or national sovereignty or the free market or pacifism-have a way of drying up while the sap of life goes flowing in another direction.

Man's will creates the things that paralyze his brain and brutalize his heart.

The problem of freedom in America is that of maintaining a competition of ideas, and you do not achieve that by silencing one brand of idea.

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.

Next to the striking of fire and the discovery of the wheel, the greatest triumph of what we call civilization was the domestication of the human male.