How did the very first cities begin?
Imagine the world ten thousand years ago. No roads. No buildings. No cities at all. Just small groups of people wandering from place to place, following herds of animals and gathering berries when they found them. Where did they sleep? Wherever they happened to be when the sun went down. But then something changed — something that made people stop wandering and stay in one spot. And when they stayed, the very first cities began to grow.
The big change was farming. People figured out that if you planted seeds in the ground and took care of them, food would grow in the same spot every year. Wheat. Barley. Lentils. No more chasing dinner across the valley. This happened first in a place called the Fertile Crescent, between two rivers in what's now Iraq. Once you have a farm, you can't just walk away from it. You have to stay and water it, protect it, harvest it. So people built houses near their fields and lived there all year round.
