Our first and most pressing problem is how to do away with warfare as a method of solving conflicts between national groups or between groups within a society who have different views about how the society is to be run. If you look back, you will see that warfare was an invention, just as ways of handling government or taxes are inventions. You will see, too, that once people use an invention they go on using it until they find another which they think is superior.

I approached the idea of college with the expectation of taking part in an intellectual feast. ... In college, in some way that I devoutly believed in but could not explain, I expected to become a person.

most people prefer to carry out the kinds of experiments that allow the scientist to feel that he is in full control of the situation rather than surrendering himself to the situation, as one must in studying human beings as they actually live.

The atmosphere is the key symbol of global interdependence.

A small group of thoughtful people could change the world.

We are living beyond our means. As a people we have developed a life-style that is draining the earth of its priceless and irreplaceable resources without regard for the future of our children and people all around the world.

You can never have a relationship with someone whose smell you don't like.