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Man tends to increase at a greater rate than his means of subsistence.

People used to think that more population was bad for growth. In this view, people are stomachs - they eat, leaving less for everyone else. But once we realize the importance of ideas in the economy, people become brain - they innovate, creating more for everyone else.

The system has for its object an increase of persons that are to intervene between the producer and the consumer, living on the product of the land and labour of others, diminishing the power of the first, and increasing the number of the last.

In a state therefore of great equality and virtue, where pure and simple manners prevailed, the increase of the human species would evidently be much greater than any increase that has been hitherto known.

We used to live in a world where the price of resources came down steadily, and now the world has changed. You have a great mismatch between finite resources and exponential population growth.

It is probable that for a long time to come the mass of mankind in civilized countries will find it both necessary and advantageous to labor for wages, and to accept the condition of hired laborers.

With the rather stable ratio of labor force to total population, a high rate of increase in per capita product means a high rate of increase in product per worker; and, with average hours of work declining, it means still higher growth rates in product per man-hour.

The demographic complexity of this country should be reflected not only at the end of the chain, but since the beginning, in order that more of these people can be excited and integrated.

Human population supplies the labor necessary for the creation of wealth; carbon supplies the matter and energy.

The Malthusian Theory - that mankind, for biological and sociological reasons, is so fertile, so fecund, that if you started out with the new continent and plenty of land for everybody, in several generations we would multiply our numbers.