When problems arise, you find solutions and new ways to do things. Examples of this are the wheel, a plow, irrigation, and arches.

Think of a pyramid where the wealthy kings and priests are at the top and the slaves are at the bottom. Merchants, artists, soldiers, and farmers make up the middle. It shows the different classes of people.

This was invented to keep records of things that were bought and sold. This was also used so that the citizens knew the rules and laws of the society. In Mesopotamia, it is called Cuneiform and tools you use are a stylus and clay tablet.

A stable food supply led to the development of people living together in groups. They had a brick-lined wall surrounding the homes and ziggurat and a king was in charge. They also controlled the surrounding land and each worshiped its own god.

People living together in large groups called for the creation of this characteristic. Hammurabi wrote this down and citizens were held accountable.

This was part of their way of life. It tied people together through their beliefs. Each city-state worshiped their own god. The temple called the ziggurat was important.

Because of a stable food supply, citizens did not all have to farm or worry about their next meal. This led to people learning new skills and trades. Examples of this are soldiers, pottery, and artists.