Even with nomads, they had territory they could live in or not live in, based on the existence of other tribes. I was clumping that in with real estate. Even an

Even with nomads, they had territory they could live in or not live in, based on the existence of other tribes. I was clumping that in with real estate. Even animals do this (for example wolves). And obviously in the feudal system land was a big deal. And yes technological arms races exist but they are often power games between governments, although in some cases a tribe could become a genocide victim if nobody wants to participate in the military effort. So in that case I agree it's maybe not bullshit, but it depends on the behavior of the neighbors. Energy is a free source of energy from the sun plus it gets stored for free in various ways (such as vegetation). So that doesn't really have to be factored into the discussion.