The theory of force has been advanced for two purposes: to explain how the state originated, and how it is maintained afterwards. According to this theory, the state is a child of force, that is, of aggression, war, conquest and subjugation.
In the primitive ages a strong man or king, with the support of his warriors, subjugated the weaker men of his tribe and established the political relation of command and obedience.
Hence the saying: “War begot the king”. This was the beginning of the state. A strong man enslaved the weaker men and became the chief of his tribe. A strong tribe subdued its weaker neighbours and founded a kingdom. The king of a strong kingdom conquered the weaker kingdoms around him and established an empire.