Hmmm I try to give you some legitimate reason to claim more land. You rejected it. That's weird.
Because most people are not selfish dicks, unlike you.
there is no evidence that such laws existed in Africa back then, right?
back then there were no laws. Only thing that could prevent you from claiming your neigbour's "house" would be him and his willingness to beat you up.
All this logic is bullshit made up to justify stealing land, and you even said it yourself.