Security

e evolution of warfare made a successful fighting machine something elaborate, expensive, and maintainable by professionals only. Like in the Roman Empire. It took years to train a legionnaire and a lot of money to equip an army and keep it in the field. So Rome became autarchic. However, it was not so expensive a proposition that a rebellious general couldn't put some troops up for a while--or he could pay them with plunder. So you did get civil wars. Later, when the Empire had broken up and warfare relied largely on the individual barbarian who brought his own weapons with him, government loosened. It had to--any ruler who got to throwing his weight around too much would have insurrection on his hands. Then as war again became an art--well, you see how it goes. There are other factors, of course, like religion--ideology in general. But by and large, it's worked out the way I explained it. Because there are always people willing to fight when government encroaches on what they consider their liberties, and g