The monogamous family began to be the economic unit of society.
The increase of population necessitated a closer consolidation against internal and external foes. The federation of related tribes became unavoidable. Their amalgamation, and thence the amalgamation of the separate tribal territories to one national territory, was the following step. The military leader—rex, basileus, thiudans—became an indispensable and standing official. The public meeting was introduced wherever it did not yet exist. The military leader, the council of chiefs, and the public meeting formed the organs of the military democracy that had grown out of the gentile constitution. Military democracy—for now war and organization for war were regular functions of social life. The wealth of the neighbors excited the greed of nations that began to regard the acquisition of wealth as one of the main purposes of their life. They were barbarians: robbing appeared to them easier and more honorable than producing. War, once simply a revenge for transgressions or a means for enlarging a territory that had become too narrow, was now waged for the sake of plunder alone and became a regular profession. Not in vain did threatening walls cast a rigid stare all around the new fortified towns: their yawning ditches were the tomb of the gentile constitution, and their turrets already reached up into civilization. The internal affairs underwent a similar change. The plundering wars increased the power of the military leader and of the subcommanders. The habitual election of the successors from the same family was gradually transformed into hereditary succession, first by sufferance, then by claim, and finally by usurpation. Thus the foundation of hereditary royalty and nobility was laid. In this manner the organs of the gentile constitution
