Because at the beginning they got an increase in food security for a small increase in hours worked. Then as time went on their population grew larger and they became better able to divide into agricultural, administrative and violence specialists and with their greater population and capacity for violence they expanded. The greater population and military prowess meant that in a competition with hunter gatherers for land and other resources the agriculturalists generally won. They couldn’t revert to hunter gathering without huge loss of life due to the loss of food and over time their population grew until they were near the carrying capacity of agriculture and sometimes overshot and died in famines or wars.
Agriculture is great for a small number of generations for everyone and then you can’t go back without mass death.
Agriculture is great for a small number of generations for everyone and then you can’t go back without mass death.