On the other hand, "humanism" means at bottom being imbued with an intelligent sense of human interests. The social interest, identical in its deepest meaning with a moral interest, is necessarily supreme with man. Knowledge about man, information as to his past, familiarity with his documented records of literature, may be as technical a possession as the accumulation of physical details. Men may keep busy in a variety of ways, making money, acquiring facility in laboratory manipulation, or in amassing a store of facts about linguistic matters, or the chronology of literary productions. Unless such activity reacts to enlarge the imaginative vision of life, it is on a level with the busy work of children. It has the letter without the spirit of activity. It readily degenerates itself into a miser's accumulation, and a man prides himself on what he has, and not on the meaning he finds in the affairs of life. Any study so pursued that it increases concern for the values of life, any study producing greater sensitiveness to social well-being and greater ability to promote that well-being is humane study. The humanistic spirit of the Greeks was native and intense but it was narrow in scope. Everybody outside the Hellenic circle was a barbarian, and negligible save as a possible enemy. Acute as were the social observations and speculations of Greek thinkers, there is not a word in their writings to indicate that Greek civilization was not self-inclosed and self-sufficient. There was, apparently, no suspicion that its future was at the mercy of the despised outsider. Within the Greek community, the intense social spirit was limited by the fact that higher culture was based on a substratum of slavery and economic serfdom--classes necessary to the existence of the state, as Aristotle declared, and yet not genuine parts of it. The development of science has produced an industrial revolution which has brought different peoples in such close contact with one another through colonization and commerce that no matter how some nations may still look down upon others, no country can harbor the illusion that its career is decided wholly within itself. The same revolution has abolished agricultural serfdom, and created a class of more or less organized factory laborers with recognized political rights, and who make claims for a responsible role in the control of industry--claims which receive sympathetic attention from many among the well-to-do, since they have been brought into closer connections with the less fortunate classes through the breaking down of class barriers.