No limits whatever are placed to the productions of the earth; they may increase forever.

The doctrine of population has been conspicuously absent, not because I doubt in the least its truth and vast importance, but because it forms no part of the direct problem of economics.

In general it may be said that demand is quite as necessary to the increase of capital as the increase of capital is to demand.

Population trends have always provoked doom-fraught oracles, because their popular interpreters suppose that every new series will be infinitely sustained; yet, beyond the short term, expectations based on them are never fulfilled.

The prodigious waste of human life occasioned by this perpetual struggle for room and food, was more than supplied by the mighty power of population, acting, in some degree, unshackled, from the constant habit of emigration.

Had population and food increased in the same ratio, it is probable that man might never have emerged from the savage state.

No limits whatever are placed to the productions of the earth; they may increase forever.