of the Republic, to foreign nations who employ it to their exclusive profit. Perhaps no moment in the history of our nation requires a greater combination of qualifications in its public men. The student may contemplate this most interesting transformation, displayed before his eyes like the moving film of a gigantic cinematograph which permits him to grasp at once the different phases of the social problem which it presents. Rarely in the history of humanity has it been possible to contemplate a like spectacle. The United States presented it a half century ago, to the astonished gaze of men of that day who were but little familiar with social problems. The Argentine Republic is repeating now the same phenomenon, with this difference that it can observe itself and be guided by the experience acquired elsewhere. Other countries of the world, in the future will, no doubt, in their turn repeat a similar evolution, though perhaps in a different environment. But the interesting part of the present moment is that the Argentine Republic is sailing upon the same course in the twentieth century that the United States did in the nineteenth. Our evolution is proceeding with greater care because it is being worked out amid better conditions. We can now take advantage of the costly experience gained by our brothers of the north and so by avoiding many of their errors, seek to escape the shoals upon which they stranded and the mistakes which they involuntarily committed, even though we have in our turn special problems which they did not have. Thus the tremendous politico-social crisis of the North American War of Secession will not be repeated in the southern hemisphere and the Argentine social evolution will not have to solve the profound anthropological problem of the rivalry of races, which, in the United States, arises from the white, black and yellow races, living together side by side.