When and Why do people live in cities?

City - a conglomeration of people and buildings clustered together to serve as a center of politics, culture, and economics

Urban - the build up of the central city and the suburban

Realm - the city and the surrounding environs connected to the city

For the first time in human history, there our more people living in the cities then country

First Urban Revolution

Agriculture Villages, before urbanization, people often clustered in agriculture villages, a relatively small, equalitarian village, where most of the population was involved in agriculture.

About 10,000 years ago, people started living in agriculture villages.

1. Agriculture surplus

2. Social Stratification

Five Hearths of Urbanization

1. Mesopotamia, 3,500 BC

2. Nile River Valley, 3,200 BC

3.  Indus River Valley, 2,200 BC

4. Huang He, Wei River Valley, 1,500 BC

5. Mesoamerica, 200 BC