The simplest and most natural political institution is that of tribes. It is the only form of government known to rude and savage nations. Civilization is the result of a great concentration of powerful physical and intellectual forces,[53] which, in small and scattered fragments, is impossible. The first step towards it is, therefore, undoubtedly, the union of several tribes by alliance or conquest. Such a coalescence is what we call a nation or empire. I think it admits of an easy demonstration, that in proportion as a human family is endowed with the capacity for intellectual progress, it exhibits a tendency to enlarge the circle of its influence and dominion. On the contrary, where that capacity is weak, or wanting, we find the population subdivided into innumerable small fragments, which, though in perpetual collision, remain forever detached and isolated. The stronger may massacre the weaker, but permanent conquest is never attempted; depredatory incursions are the sole object and whole extent of warfare. This is the case with the natives of Polynesia, many parts of Africa, and the Arctic regions. Nor can their stagnant condition be ascribed to local or climatical causes. We have seen such wretched hordes inhabiting, indifferently, temperate as well as torrid or frigid zones; fertile prairies and barren deserts; river-shores and coasts as well as inland regions. It must therefore be founded upon an inherent incapacity of progress. The more civilizable a race is, the stronger is the tendency for aggregation of masses. Complex political organizations are not so much the effect as the cause of civilization.[54] A tribe with superior intellectual and physical endowments, soon perceives that, to increase its power and prosperity, it must compel its neighbors to enter into the sphere of its influence. Where peaceful means fail, war is resorted to. Territories are conquered, a division into classes established between the victorious and the subjugated race; in one word, a nation has made its appearance upon the theatre of history. The impulse being once given, it will not stop short in the career of conquest. If wisdom and moderation preside in its councils, the tracks of its armies will not be marked by wanton destruction and bloodshed; the monuments, institutions, and manners of the conquered will be respected; superior creations will take the place of the old, where changes are necessary and useful;--a great empire will be formed.[55] At first, and perhaps for a long time, victors and vanquished will remain separated and distinct. But gradually, as the pride of the conqueror becomes less obtrusive, and the bitterness of defeat is forgotten by the conquered; as the ties of common interest become stronger, the boundary line between them is obliterated. Policy, fear, or natural justice, prompts the masters to concessions; intermarriages take place, and, in the course of time, the various ethnical elements are blended, and the different nations