Civilization

People with common language, customs, government, and economy, earliest in Mesopotamia 3000 BC.

I think that a civilization needs a form of government (a set of laws), a written language, so they can record their history and accomplishments so they don’t have to repeat the same mistakes or invent the same thing over, a form of education, skilled workers, an agricultural surplus to feed the skilled workers, law enforcement, economy, some sort of religion, currency or trading system, and most importantly, people.