It is not surprising that some men are brought to regard all idealism as a mere smoke-screen behind which the search for material profit may be more effectually carried on, and are converted to the materialistic interpretation of history. "Reality" is then conceived as physical force and as sensations of power, profit and enjoyment; any politics that takes account of other factors, save as elements of clever propaganda and for control of those human beings who have not become realistically enlightened, is based on illusions. But others are equally sure that the real lesson of the war is that humanity took its first great wrong step when it entered upon a cultivation of physical science and an application of the fruits of science to the improvement of the instruments of life--industry and commerce. They will sigh for the return of the day when, while the great mass died as they were born in animal fashion, the few elect devoted themselves not to science and the material decencies and comforts of existence but to "ideal" things, the things of the spirit. Yet the most obvious conclusion would seem to be the impotency and the harmfulness of any and every ideal that is proclaimed wholesale and in the abstract, that is, as something in itself apart from the detailed concrete existences whose moving possibilities it embodies. The true moral would seem to lie in enforcing the tragedy of that idealism which believes in a spiritual world which exists in and by itself, and the tragic need for the most realistic study of forces and consequences, a study conducted in a more scientifically accurate and complete manner than that of the professed _Real-politik_. For it is not truly realistic or scientific to take short views, to sacrifice the future to immediate pressure, to ignore facts and forces that are disagreeable and to magnify the enduring quality of whatever falls in with immediate desire. It is false that the evils of the situation arise from absence of ideals; they spring from wrong ideals. And these wrong ideals have in turn their foundation in the absence in social matters of that methodic, systematic, impartial, critical, searching inquiry into "real" and operative conditions which we call science and which has brought man in the technical realm to the command of physical energies.