About 2 million years ago early developed humans were hunter-gatherers. They wandered from place to place, they hunted animals and also gathering plants and food. They also lived in caves and tents. They did not have homes to live in like we have now.
During the paleolithic age people found food a different way than we do now. The people would hunt for animals and gather plants for food to eat with their families. Early farmers also learned how to domesticate animals. They raised there own sheep, goats, and cattle for good meat. This was the start of agriculture. It was the first time that humans had control over the food they ate.
In paleolithic times, small bands of perhaps 20 to 60 wandered place to place just to find food . Village dwellers even learned how to do a task more quickly, for example could share the work of making stone axes knife blades. They also could invent new and different ways of making their lives more comfortable and much safer. All of these changes in farming villages led to growing populations.