Democracy
Monarchy
Polytheism
Ziggurat
City-state
Monarchy
Levee
Ziggurat
Levee
Domestication
Cuneiform
Polytheism
Monsrchy
Cuneiform
Ziggurat
Euphrates River
Tigris River
Euphrates River
Tigris River
Euphrates River
Monarchy
Polytheism
City-states
Democracy
Monarchy
Polytheism
Democracy
Domestication
Domestication
Levee
Ziggurat
Polytheism
Democracy
Euphrates River
City-state
Levee