Population, when unchecked, goes on doubling itself every 25 years or increases in a geometrical ratio.

To prevent the recurrence of misery is, alas! beyond the power of man.

If it be taught that all who are born have a right to support on the land, whatever be their number, and that there is no occasion to exercise any prudence in the affair of marriage so as to check this number, the temptations, according to all the known principles of human nature, will inevitably be yielded to, and more and more will gradually become dependent on parish assistance.

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

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.

In 1860, sixty-three per cent of the couples married in Great Britain had families of four or more children; in 1925 only twenty per cent had more than four.