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

To minds of a certain cast there is nothing so captivating as simplification and generalization.

The moon is not kept in her orbit round the earth, nor the earth in her orbit round the sun, by a force that varies merely in the inverse ratio of the squares of the distances.

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.

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.

Whether the law of marriage be instituted or not, the dictate of nature and virtue seems to be an early attachment to one woman.

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.