But my two neighbors, each with his butchered prisoner, are in a similar difficulty, and though I could quite easily defend my larder, we deem it better on the next occasion to join forces and kill one prisoner at a time. I share mine with the other two; they share theirs with me. There is no waste through putrefaction. It is the earliest form of the surrender of the use of force in favor of co-operation--the first attenuation of the tendency to act on impulse. But when the three prisoners are consumed, and no more happen to be available, it strikes us that on the whole we should have done better to make them catch game and dig roots for us. The next prisoners that are caught are not killed--a further diminution of impulse and the factor of physical force--they are only enslaved, and the pugnacity which in the first case went to kill them is now diverted to keeping them at work. But the pugnacity is so little controlled by rationalism that the slaves starve, and prove incapable of useful work. They are better treated; there is a diminution of pugnacity. They become sufficiently manageable for the masters themselves, while the slaves are digging roots, to do a little hunting. The pugnacity recently expended on the slaves is redirected to keeping hostile tribes from capturing them--a difficult matter, because the slaves themselves show a disposition to try a change of mastership. They are bribed into good behavior by better treatment: a further diminution of force, a further drift towards co-operation; they give labor, we give food and protection. As the tribes enlarge, it is found that those have most cohesion where the position of slaves is recognized by definite rights and privileges. Slavery becomes serfdom or villeiny. The lord gives land and protection, the serf labor and military service: a further drift from force, a further drift towards co-operation, exchange. With the introduction of money even the form of force disappears: the laborer pays rent and the lord pays his soldiers. It is free exchange on both sides, and economic force has replaced physical force. The further the drift from force towards simple economic interest the better the result for the effort expended. The Tartar khan, who seizes by force the wealth in his State, giving no adequate return, soon has none to seize. Men will not work to create what they cannot enjoy, so that, finally, the khan has to kill a man by torture in order to obtain a sum which is the thousandth part of what a London tradesman will spend to secure a title carrying no right to the exercise of force from a Sovereign who has lost all right to the use or exercise of physical force, the head of the wealthiest country in the world, the sources of whose wealth are the most removed from any process involving the exercise of physical force.