The world's problem is not too many people, but lack of political and economic freedom.

Because we can expect future generations to be richer than we are, no matter what we do about resources, asking us to refrain from using resources now so that future generations can have them later is like asking the poor to make gifts to the rich.

Our whole evolution up to this point shows that human groups spontaneously evolve patterns of behavior, as well as patterns of training people for that behavior, which tend on balance to lead people to create rather than destroy. Humans are, on net balance, builders rather than destroyers.

There is only one important resource which has shown a trend of increasing scarcity rather than increasing abundance. That resource is the most important of all—human beings. . . . [An] increase in the price of peoples’ services is a clear indication that people are becoming more scarce even though there are more of us.

It is your mind that matters economically, as much or more than your mouth or hands. In the long run, the most important economic effect of population size and growth is the contribution of additional people to our stock of useful knowledge. And this contribution is large enough in the long run to overcome all the costs of population growth.

Human beings create more than they destroy.

Progress toward a more abundant material life does not come like manna from heaven. . . . My message certainly is not one of complacency. In this I agree with the doomsayers: our world needs the best efforts of all humanity to improve our lot.