Bronze and Iron AgesGovernment & Law Egypt unified c. 3,100 BCETurning point Upper and Lower Egypt unite under the first pharaohs, beginning about 3,000 years of dynastic rule. ▲ MattersSaveShareTrace roots Longest chain: The Big Bang → First stars ignite → Supernovae seed heavy elements → The Sun forms → Earth forms → First oceans → First life → Photosynthesis evolves → Great Oxidation Event → Complex cells (eukaryotes) → Multicellular life → First animals → Cambrian Explosion → First vertebrates → Jawed fish → Fish walk onto land → The amniotic egg → The Great Dying → Dinosaurs appear → Asteroid ends the dinosaurs → Early primates → Apes split from monkeys → Human line splits from chimpanzees → Walking upright → First stone tools → Genus Homo appears → Homo erectus → Control of fire → Habitual fire and cooking → Homo sapiens appears → Complex language → Natufian villages → Oldest known bread → Agriculture begins → Irrigation → Egypt unified Community notesLoading notes… Learn more ranked by votesDocumentbritannica.comMenes, legendary unifier of Egypt (Britannica) ↗Editor's pickBookToby WilkinsonThe Rise and Fall of Ancient Egypt ↗Editor's pickVideoSearch on YouTubeNarmer unification of Egypt ↗Editor's pick