Society has long since mastered the difficulties of adjustment with physical conditions, but cannot arrange its own intersocial conditions on a satisfactory basis. “Man’s inhumanity to man makes countless thousands mourn”—not nature’s. From the Arctic Circle to the Tropics man gets along contentedly enough with natural obstacles; he may be checked and modified in development, but he is not unhappy; he strikes a balance with nature and is comparatively at rest. But in his progressive social development he has not yet been able to strike a balance; his interhuman relations are uncertain and mischievous. So far as history shows us, each social group seems to have carried within it the seeds of disease; to have grown worse as it progressed; and, while conquering all external difficulties, to have succumbed in the end to its own inward disorders. The suffering of an advanced society is not that of one struggling for subsistence, or in combat with enemies, but of one in the throes of disease. Society has safety, peace, shelter, warmth, enough to eat,—and chronic indigestion! Are these disadvantages of human life essential, as heretofore supposed; or are they merely pathological phenomena and quite unnecessary? We are now beginning to take the latter view, and a most cheerful one it is. Instead of accepting “human nature” as a fixed condition of mingled pain and pleasure, goodness and badness, with the pain and badness preponderating, we are now recognising that human nature grows and changes like the rest of created forms; that it has already greatly changed and improved, and will continue to do so. We are learning that the troubles of any race and time are partly external and subduable; partly internal and these also subduable. See, for instance, a savage tribe in North America. Their existence is retarded by certain conditions of climate and geography; of the fauna and flora surrounding them; of animal and human enemies and competitors; but also and more seriously by their superstitions. The theory of witchcraft; the ignorance as to hygiene and belief in “the medicine man”; the contempt for women and so for productive labour—these kept the savage savage in the same region where another race is civilised. That race, dominated by larger and truer concepts, has conquered the same external difficulties and risen to far higher levels.