The social conditions and social future of America constitute a system of problems quite distinct and separate from the social problems of any other part of the world. The nearest approach to parallel conditions, and that on a far smaller and narrower scale, is found in the British colonies and in the newly settled parts of Siberia. For while in nearly every other part of the world the population of to-day is more or less completely descended from the prehistoric population of the same region, and has developed its social order in a slow growth extending over many centuries, the American population is essentially a transplanted population, a still fluid and imperfect fusion of great fragments torn at this point or that from the gradually evolved societies of Europe. The European social systems grow and flower upon their roots, in soil which has made them and to which they are adapted. The American social accumulation is a various collection of cuttings thrust into a new soil and respiring a new air, so different that the question is still open to doubt, and indeed there are those who do doubt, how far these cuttings are actually striking root and living and growing, whether indeed they are destined to more than a temporary life in the new hemisphere. I propose to discuss and weigh certain arguments for and against the belief that these eighty million people who constitute the United States of America are destined to develop into a great distinctive nation with a character and culture of its own. Humanly speaking, the United States of America (and the same is true of Canada and all the more prosperous, populous and progressive regions of South America) is a vast sea of newly arrived and unstably rooted people. Of the seventy-six million inhabitants recorded by the 1900 census, ten and a half million were born and brought up in one or other of the European social systems, and the parents of another twenty-six millions were foreigners. Another nine million are of African negro descent. Fourteen million of the sixty-five million native-born are living not in the state of their birth, but in other states to which they have migrated. Of the thirty and a half million whites whose parents on both sides were native Americans, a high proportion probably had one if not more grandparents foreign-born. Nearly five and a half million out of thirty-three and a half million whites in 1870 were foreign-born, and another five and a quarter million the children of foreign-born parents. The children of the latter five and a quarter million count, of course, in the 1900 census as native-born of native parents. Immigration varies enormously with the activity of business, but in 1906 it rose for the first time above a million.