A person's genetic endowment, a product of the evolution of the species, is said to explain part of the workings of his mind and his personal history the rest.

The problem of far greater importance remains to be solved. Rather than build a world in which we shall all live well, we must stop building one in which it will be impossible to live at all.

When we say that a man controls himself, we must specify who is controlling whom.

A fourth-grade reader may be a sixth-grade mathematician. The grade is an administrative device which does violence to the nature of the developmental process.

If the world is to save any part of its resources for the future, it must reduce not only consumption but the number of consumers.

The one fact that I would cry form every housetop is this: the Good Life is waiting for us - here and now.

Indeed one of the ultimate advantages of an education is simply coming to the end of it.