They did this by obtaining a food surplus. This would allow for specialization, which means there are people in society that are not involved in agriculture. Now it was possible to have soldiers, politicians, priests and artisans, and as a result, have a more complex society.
HOP THAT HELPS
Cause never mind just watch crashcourse world history its on youtube
Yah it was limited by UR MOM
It’s the blue group thingy