Unification of Upper and Lower Egypt: Formation of the first Egyptian dynasty under Pharaoh Narmer (or Menes), marking the start of the Early Dynastic Period.
reign - 3173–2987 BC
![]()
Emergence of Writing in Mesopotamia: Development of cuneiform script by the Sumerians, one of the earliest known writing systems.
Construction of the First Ziggurats: Sumerians begin constructing monumental religious structures.

Early Urbanization: Cities like Uruk in Mesopotamia reach peak development, with advanced social structures.
Start of the Harappan Civilization: Early Harappan communities begin urbanization in the Indus Valley.
Bronze Age Begins: Transition from the use of stone tools to bronze tools and weapons in many parts of the world.
Stonehenge Construction Begins: The first phase of Stonehenge in Britain, involving large earthworks and circular ditches.
Development of Sailboats: Sumerians invent the first sailboats for use in river and coastal trade.
Rise of Longshan Culture in China: Early Longshan settlements emerge, laying the groundwork for Chinese civilization.
Norte Chico Civilization in Peru: Urban centers like Caral emerge in the Americas, showcasing early societal complexity.