I have always used the world of make-believe with a certain desperation.

In world history, those who have helped to build the same culture are not necessarily of one race, and those of the same race have not all participated in one culture.

The prime lesson the social sciences can learn from the natural sciences is just this: that it is necessary to press on to find the positive conditions under which desired events take place, and that these can be just as scientifically investigated as can instances of negative correlation. This problem is beyond relativity.

... oh, I long to prove myself by writing! The best seems to die in me when I give it up. It is the self I love--not this efficient, philanthropic self.

We must accept all the implications of our human inheritance, one of the most important of which is the small scope of biologically transmitted behavior, and the enormous role of the cultural process of the transmission of tradition.

War is, we have been forced to admit, even in the face of its huge place in our civilization, an asocial trait.

Racism remains in the eyes of history ... merely another instance of the persecution of minorities for the advantage of those in power.