Reply #20: In that case you need to go back to Evolutionary Psychology

[GliderGuider]

It has always seemed to me that class wars, or more generally the maintenance of hierarchies by force is such a universal feature of human societies that it must have a very strong genetic component. Truly egalitarian cultures are relatively rare and short-lived, usually due to the effects described by Andrew Schmookler in his book "The Parable of the Tribes". The same dynamic applies to individuals. The money quote from the book is this:

Imagine a group of tribes living within reach of one another. If all choose the way of peace, then all may live in peace. But what if all but one choose peace, and that one is ambitious for expansion and conquest? What can happen to the others when confronted by an ambitious and potent neighbor? Perhaps one tribe is attacked and defeated, its people destroyed and its lands seized for the use of the victors. Another is defeated, but this one is not exterminated; rather, it is subjugated and transformed to serve the conqueror. A third seeking to avoid such disaster flees from the area into some inaccessible (and undesirable) place, and its former homeland becomes part of the growing empire of the power-seeking tribe. Let us suppose that others observing these developments decide to defend themselves in order to preserve themselves and their autonomy. But the irony is that successful defense against a power-maximizing aggressor requires a society to become more like the society that threatens it. Power can be stopped only by power, and if the threatening society has discovered ways to magnify its power through innovations in organization or technology (or whatever), the defensive society will have to transform itself into something more like its foe in order to resist the external force.

I have just outlined four possible outcomes for the threatened tribes: destruction, absorption and transformation, withdrawal, and imitation. In every one of these outcomes the ways of power are spread throughout the system. This is the parable of the tribes.