From African origins to cities, empires, and global acceleration
World history tracks Homo sapiens from deep prehistory through farming, bronze cities, axial faiths, and early modern exchange. Modern humans arose in Africa roughly three hundred thousand years ago, spread worldwide by twelve thousand BCE, then built civilizations whose tools and trade still shape how we periodize the story.
Human history records the species from prehistory to now. Anatomically modern people evolved in Africa about three hundred thousand years ago, lived as hunter-gatherers, left Africa during the Last Ice Age, and reached every continent except Antarctica by twelve thousand years ago. The Neolithic Revolution in West Asia brought systematic plant and animal husbandry, sedentary villages, and pressure toward accounting and writing. Early civilizations rose in Mesopotamia, Egypt, Peru, the Indus Valley, and China in the fourth millennium BCE, followed by axial-age philosophies and later post-classical empires, gunpowder, and printing.
Early modern centuries saw European exploration and colonization, Renaissance and Enlightenment shifts, and an eighteenth-century knowledge surge that fed the Industrial Revolution and Great Divergence. The last two and a half centuries accelerated population, industry, war, and environmental change. Scholars combine history, archaeology, anthropology, linguistics, and genetics, dividing the span through many period schemes. Hominins diverged from great apes millions of years ago, walked upright, used stone tools by 3.3 million years ago, and saw Homo habilis with enlarged brains by 2.3 million years ago.
Homo erectus spread beyond Africa; fire for heat and cooking appeared between 1.5 million and four hundred thousand years ago. Later species such as Neanderthals and Denisovans interbred with Homo sapiens rather than following a simple linear tree. By 125,000 years ago anatomy was modern; by 100,000 years ago people buried dead and wore ornament. Out-of-Africa migrations peaked around seventy to fifty thousand years ago for non-African lineages; Australia, Europe, and the Americas were settled during the Ice Age, with extinctions of megafauna and Neanderthals linked to climate and human activity.
Agriculture arose independently in at least eleven centers after about 10,000 BCE—wheat and sheep in Mesopotamia by 8500 BCE, rice in the Yangtze, millet in the Yellow River, sorghum in the Sahara, crops in the Indus by 7000 BCE, squash in South America. Surplus supported cities, states, and recurring conflict between herders and farmers. Copper tools appeared around 6400 BCE; bronze spread in the third millennium BCE. River civilizations shared governments, record keeping, wheels, math, sailing, and polytheistic temples; writing emerged in Mesopotamia, Egypt, China, and Mesoamerica on independent paths, enabling administration and long-distance trade that already imported tin from distant lands.
Source: Human history
