WHAT is to be the religion of the future? How far will traditional beliefs be affected by the view of the universe which modern science sets before us? Such are vitally important questions which in the present volume an American author tries to answer. The man of science takes for his postulate the uniformity of Nature. It has served him well, for vipon it the physical and biological sciences have been built. But are man's ethical and aesthetic faculties, which dominate human life, conditioned by inexorable law? Could we, if we knew completely a man's history and environment, predict his every action? The man of science is tempted to answer “Yes,” and his creed is, then, extraordinarily like the Stoic determinism to be found, for instance, in Marcus Aurelius. Most of us, however, are certain that we have free-will. As we make the admission, the chains of necessity cease to bind us. We find ourselves forced to make an idealist, or spiritual, interpretation of the universe, and many hold Christianity to be the most persuasive consequential position. The Next Step in Religion: An Essay toward the Coming Renaissance. By Dr. R. W. Sellars. Pp. 228. (New York: The Macmillan Co.; London: Macmillan and Co., Ltd., 1918.) Price 1.50 dollars.