Theology still tries to interfere in medicine where moral issues are supposed to be specially involved, yet over most of the field the battle for the scientific independence of medicine has been won. No one now thinks it impious to avoid pestilences and epidemics by sanitation and hygiene; and though some still maintain that diseases are sent by God, they do not argue that it is therefore impious to try to avoid them. The consequent improvement in health and increase of longevity is one of the most remarkable and admirable characteristics of our age. Even if science had done nothing else for human happiness, it would deserve our gratitude on this account. Those who believe in the utility of theological creeds would have difficulty in pointing to any comparable advantage that they have conferred upon the human race.