Hello,
Based on my readings, early humans settled into agriculture instead of the previous hunter-gatherer lifestyle. This could be because of the discovery of beer which led people discover fermentation which then led people to make bread and ext. So to answer your question, early humans found it hard to hunt animals because they had to move a lot and in doing so they would find it hard to stay near a proper water source(lakes, rivers) so they took on farming which meant they stayed in one place, probably near a river. This also led to artisans and traders.
