Oh, that's a much more complicated topic. There were many models of such systems, many of which were communal, without clear leaders or rulers. Agriculture was

Oh, that's a much more complicated topic. There were many models of such systems, many of which were communal, without clear leaders or rulers. Agriculture was developing for thousands of years, so it's understandable. The beginnings of agriculture and civilizations are very interesting, sometimes even surprising, in light of new findings. I'd recommend "The Dawn of Everything"; it delves into these topics in great length.