A writer may tell me that he thinks man will ultimately become an ostrich. I cannot properly contradict him.

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.

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.

The most baleful mischiefs may be expected from the unmanly conduct of not daring to face truth because it is unpleasing.

Nature herself in times of great poverty or bad climatic conditions, as well as poor harvest, intervenes to restrict the increase of population of certain countries or races; this, to be sure, by a method as wise as it is ruthless.

The first business of philosophy is to account for things as they are; and till our theories will do this, they ought not to be the ground of any practical conclusion.

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