What Neanderthals did to Homo Erectus, and what early indigenous Homo Sapien tribes did to Neanderthals; later indigenous tribes did to earlier indigenous tribe

What Neanderthals did to Homo Erectus, and what early indigenous Homo Sapien tribes did to Neanderthals; later indigenous tribes did to earlier indigenous tribes; and so on and so forth. At no point was the land homesteaded — by indigenous tribes or otherwise — ever fully unoccupied prior, by some definition of “unoccupied”. Intelligent lifeforms had to be driven from their rightful homes by “invaders”, categorically. Nomads in antiquity — oweing to the lack of societal advancement — could settle air quotes “unoccupied” land. This is no longer possible in the modern, advanced world where every square inch of earth is claimed by a reasonably well-organized group of (highly violent) people, at minimum. Which means nomadism in today’s world isn’t what it once was. Nomadism in antiquity might even be viewed as outright nation building; after all, every nation has to start somewhere. But nomadism in modernity — and I say this as someone with a reasonable level of experience backpacking in various countries — is really just glorified homelessness, and I think that’s a point worth making.