during the paleolithic Era, we hunted and gathered for our food.
we have a surplus of food now.
we farmed in the neolithic period.
sumer developed into the first civilization around 35000 BCE.
during the old stone age, people used stone tools. people hunted and gathered there food. Because of an unreliable supply of food, they lived a nomadic lifestyle. Groups typically were no larger than 20-60 people.
the new stone age began around 9000 BCE when people learned to grow crops. people also learned to domesticate most of the animals we use today. people were able to live in one place. agriculture created a stable supply of food, allowing to increase the population. farming villages began arising, some of them eventually turned into cities.
some ares of the world experienced a dramatic shift in there way of life: the development of civilizations. these places saw the development of writing,government,specialization, and increase technological improvements.