The document provides an overview of early human societies from hominids to the emergence of early civilizations. It discusses that hominids evolved dexterity and brainpower starting 2 million years ago. Agricultural innovations began around 10,000 BCE in various regions, leading to permanent settlements and population growth. The first complex civilization emerged in Mesopotamia, with Sumer being the earliest, developing writing, urban centers, and other hallmarks of civilization between 3500-3000 BCE. Sumer established the first city-states and had a theocratic form of government before being conquered by the Akkadian Empire, and then returning to Sumerian rule until being sacked by the Elamites around 2000 BCE.