Though the spirit of Jesus has never had more than half a chance in historic Christianity, yet it is demonstrable that the total efficiency of humanity, the bulk of work done, and the capacity for heroic tension of energies have been greatly increased by it. Taking it on the smallest scale—every real conversion means a break with debasing habits, with alcoholism, with the waste of sexual energies; it means more self-control, more responsiveness to duty, more capacity to take a long outlook, and consequently better work. We can observe this in ourselves and others. We still need the coercion of stern necessity and of public opinion to keep us straight, but an inward compulsion is added. A Christian carries his policeman around inside of him. Where Christianity gets a really firm hold on men or women, especially if there is a basis of natural ability, it pushes them on to lead in moral movements and they break away for human progress. When Christianity multiplies such cases, and makes soberness, duty, and hard work the habit of entire communities, we have a social fact of first-class importance; for the human animal is naturally lazy, sluggish, and inclined to live for today. The capacity to subordinate immediate gratification for a future good is scarce; the capacity to subordinate selfish advantage to a great common and moral good is scarcer still. We can see this force working on a larger scale on the foreign mission field where Christianity is a new social energy. There it is easier to disentangle it from other social forces. What are the comparative results when it gets a lodgment in a single social class or tribal group? This question will bear watching during the next fifty years. The full social results of Christianity will not show till the third generation. We get another demonstration of increased working efficiency in humanity wherever Christianity has passed through an internal purification which has set free more of its spiritual energies. What, for instance, has been the historic connection between the development of capitalistic industry in Holland, England, and France, and the sober and frugal piety and patient laboriousness created in the Calvinists of Holland, the Puritans of England, and the Huguenots of France? II