Secularists ask impatiently what Christianity has done or proposes to do to make mankind happier, by which they mean more comfortable. The answer is (to put it in a form intelligible to the questioner) that Christianity increases the wealth of the world by creating new values. Wealth depends on human valuation. For example, if women were sufficiently well educated not to care about diamonds, the Kimberley mines would pay no dividends, and the rents in Park Lane would go down. The prices of paintings by old masters would decline if millionaires preferred to collect another kind of scalps to decorate their wigwams. Bookmakers and company-promoters live on the widespread passion for acquiring money without working for it. It is hardly possible to estimate the increase of real wealth, and the stoppage of waste, which would result from the adoption of a rational, still more of a Christian, valuation of the good things of life. I have dealt with this subject in the essay on _The Indictment against Christianity_, and have emphasised the importance of taking into consideration, in all economic questions, the _human costs_ of production, the factors which make work pleasant or irksome, and especially the moral condition of the worker. Good-will diminishes the toll which labour takes of the labourer; envy and hatred vastly increase it while they diminish its product. It is, of course, impossible that the worker should not resent having to devote his life to making what is useless or mischievous, and to ministering to the irrational wastefulness of luxury. Christianity, in condemning the selfish and irresponsible use of money, seeks to remove one of the chief causes of social bitterness. Senseless extravagance is the best friend of revolution.