It has been said, and perhaps with truth, that the conclusions of Political Economy partake more of the certainty of the stricter sciences than those of most of the other branches of human knowledge.

I do not know that any writer has supposed that on this earth man will ultimately be able to live without food.

The friend of the present order of things condemns all political speculations in the gross.

The perpetual struggle for room and food.

The great and unlooked for discoveries that have taken place of late years have all concurred to lead many men into the opinion that we were touching on a period big with the most important changes.

The most effectual encouragement to population is, the activity of industry, and the consequent multiplication of the national products.

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.