>>13370967>a chain of eventsand this, elaborating, was agriculture.
Hunter gatherers did not need to prepare the land, they could wander around and survive. Berry bush here, berry bush there, hunting things that migrated or ever present small game. Clans might have territories which are loosely enforced with neighboring clans, but the idea of absolute ownership of a specific plot of land, be it personal or even communal, was not held.
This means that within the group, anyone could go gather berries from any bush, anyone could strip bark from a tree to make a rope with, etc.
When agriculture came around, and fields became a time investment, with clear boundries, and those fields had to be tended long term, and defended from enemies or natural disaster, the idea of ownership were born. When this was established between tribes, it also could be established between individuals within it.
Class then was born, with some having the say and control of the land, and this not necessarily being the ones who actually have to do the work on it. A class is just a combination of these two things when you get down to it, degree and method of ownership and degree and method of your labor applied to the thing owned.