Almost all predator animals have a territory and they will fight for that territory to keep others out. Chimpanzees and other great apes have clan wars over territory. And they have social hierarchies where some get more food than others.

There is a 100% chance early humans were fighting each other long before the invention of agriculture.

Are you actually arguing exploitation is necessary? That any system treating all people fairly will result in everybody starving?

Feel free to let others exploit you, I will keep trying for the fair system

They asked me how well I understood theoretical physics.

I said, I had a theoretical degree in physics.