The villages that were built along the Indus River over 5,000 years ago are among the oldest in the world.
At first, almost every villager was a farmer. As farming methods improved, farmers grew enough to feed thousands of people. That allowed some of them to do other kinds of work. They became merchants, traders, and craftsmen. Villages turned into towns, and some towns turned into cities. By 2500 B.C., the Indus civilization was large enough to have two major cities. One was Mohenjo-Daro and the other was Harappa, 400 miles to the northeast.
