...there is an optimal balance, depending on the manner of man's life, between the density of human population and the tolerances of nature. This balance, in the case of the United States would seem to me to have been surpassed when the American population reached, at a very maximum, two hundred million people, and perhaps a good deal less.

We should not lose ourselves in vainglorious sohemes for changing human nature all over the planet. Rather, we should learn to view ourselves with a sense of proportion and Christian humility before the enormous complexity of the world in which it has been given us to live.

It is obviously easier, for the short run, to draw cheap labor from adjacent pools of poverty...than to find it among one's own people. And to the millions of such prospective immigrants from poverty to prosperity, there is, rightly or wrongly, no place that looks more attractive than the United States. Given its head, and subject to no restrictions, this pressure will find its termination only when the levels of overpopulation and poverty in the United States are equal to those of the countries from which these people are now so anxious to escape.

World communism is like [a] malignant parasite which feeds on diseased tissue

A foreign policy aimed at the achievement of total security is the one thing I can think of that is entirely capable of bringing this country to a point where it will have no security at all.

A political society does not live to conduct foreign policy; it would be more correct to say that it conducts foreign policy in order to live.

The United States should not jump around like an elephant frightened by a mouse.