These robber chiefs had no right but might. They were outlaws, and lived either in a country which had no government and laws, or in one whose government was too weak to protect its people. They were no worse, however, than the so-called feudal barons who came after them, who oppressed the people even more, because they had on their side whatever law and government existed in those days. Now let us stop to consider how first there came to be kings. In the early days of the human race and also in later days among barbarous peoples, the land was very sparsely settled. The reason lay in the chief occupations of the men. A small tribe might inhabit a great stretch of territory through which they wandered to keep within reach of plenty of game. As time went on, however, the population increased, and, as agriculture took the place of hunting, and homes became more lasting, tribes found themselves living in smaller and smaller tracts of land, and hence nearer to their neighbors. In some cases, constant fighting went on, just as Caesar tells us that two thousand years ago, the Swiss and the Germans fought almost daily battles back and forth across the Rhine. In other cases, the tribes found it better for all concerned to make treaties of peace with their neighbors, and if they did not exchange visits and mix on friendly terms, at least they did not attack each other. Finally, one day there would come to several tribes which had treaties with each other a common danger, such as an invasion by some horde of another race or nation. Common interest would drive them together for mutual protection, and the chief of some one of them would be chosen to lead their joint army. In this way, we find the fifteen tribes of the Belgians uniting against the Roman army led by Julius Caesar, and electing as king over them the chief of one of the tribes “on account of his justice and wisdom.” Five years later, in the year 52 B.C., we find practically all the inhabitants of what is now France united into a nation under the leadership of Vercingetorix (Vẽr sin jet′ō riks) in one last effort to free themselves from Rome. Five hundred years later, the Romans themselves were driven to join forces with two of the Germanic tribes to check the swift invasion of the terrible Huns.