M. le Bon has produced a curious piece of evidence bearing on this question. He has measured the cranial capacity of a great number of skulls of different races, and has shown that any large collection of skulls from one of the peoples who have formed a progressive nation invariably contains a certain small number of skulls of markedly superior capacity, implying exceptionally large brains; while any similar collection of skulls from one of the unprogressive peoples, like the negro, differs, not so much in the smaller average size of the brain, as in the greater uniformity of size, that is to say, the absence of individuals of exceptionally large brains[72]. He, rightly, I think, sees in the absence of such individuals a main condition of the unprogressive character of these races; and, in the exceptionally large brains produced among the other peoples, a main condition of their progress. These indications are borne out by a review of the history of any nation that has achieved a considerable development. Every such people has its national heroes whom it rightly glorifies or worships; for to them it owes in chief part its existence. To them also it owes in large measure the forms of its institutions, its religion, its dominant ideas and ideals, its morals, its art and literature, all that of which it is most proud, all its victories of peace as well as of war, the memory of which and the common pride in which is the strongest of all national bonds[73]. Who can estimate the enormous influence of Confucius and Laotse in moulding and rendering uniform the culture of China? The influence of single individuals has undoubtedly been greater in the early than in the later stages of civilisation; for there was then a more open field, a virgin soil, as it were, for the reception of their influence. In the developed nation the mass of accumulated knowledge and tradition is so much greater, that the modifications and additions made by any one man necessarily are relatively small. The leading modern nations owe their position to their having produced great men in considerable numbers; for that reason also no one man stands out so prominently as Mahomet or Confucius or Moses. Nevertheless their existence can in many cases be traced to some few great men. Would Germany now be a nation, but for Frederick the Great and Bismarck? Would America, but for Washington, Hamilton, and Lincoln? Would Italy, but for Garibaldi and Mazzini and Cavour? How greatly is the unity of national spirit and tradition among Englishmen due to the great writers who have produced the national literature, and to the great statesmen and soldiers and sailors who have given her a proud position in the world! What would England be now if Shakespeare, Newton and Darwin, Cromwell and Chatham, Marlborough and Nelson and Wellington had never been born?