Why People Competed Over Resources

There is reasonable evidence that krushef was gearing up to invade western europe, and he didn't really care how much destruction would go along with that. He'd already killed tens of millions of people. Maybe he even enjoyed it. So, what the hell? That's what i thought. How can it be that we are doing this? It's so insane. I took political science for quite a long time, and the political scientists and the economists, they basically thought that people competed over resources. Ah, but that wasn't a very good answer, as far as i was concerned, because it n obvious to me why people valued the resources they value....