The science of political economy is essentially practical, and applicable to the common business of human life. There are few branches of human knowledge where false views may do more harm, or just views more good.

Man cannot live in the midst of plenty.

The power of population is indefinitely greater than the power in the earth to produce subsistence for man.

It is not the most pleasant employment to spend eight hours a day in a counting house.

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

The world's population will multiply more rapidly than the available food supply.

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