Prehistory refers to the period of human history before the invention of writing systems, encompassing the vast span of time from the earliest known human ancestors to the emergence of recorded history. This era is studied primarily through archaeological evidence, including stone tools, cave paintings, and burial sites, and is traditionally divided into the Stone Age, Bronze Age, and Iron Age based on technological advancements. Prehistory covers key developments such as the evolution of hominins, the mastery of fire, the development of language, the advent of agriculture (Neolithic Revolution), and the rise of complex societies. It ends at different dates in different regions, typically with the earliest written records.
1 The concept of prehistory
1.1 Definition and scope
Prehistory denotes the period of human existence for which no contemporary written records exist. Its study relies on interdisciplinary methods including archaeology, anthropology, paleontology, and geology. The scope extends from the first stone tools, roughly 3.3 million years ago, to the appearance of writing systems in various regions, a threshold that varies from c. 3400 BCE (Sumer) to as late as the 19th century CE (parts of the Pacific).
1.2 Chronological boundaries
The beginning of prehistory is marked by the earliest hominin tool use. The end is defined regionally by the adoption of writing. In the Near East, prehistory ends around 3200 BCE with Sumerian cuneiform; in China, it ends c. 1200 BCE with Oracle bone script; in Mesoamerica, c. 600 BCE with Olmec glyphs. Some regions, such as Sub-Saharan Africa, transitioned to history later, often after contact with literate cultures.
1.3 Sources of evidence
Prehistoric evidence comes from archaeological sites (e.g., hearths, middens, structures), artifacts (tools, pottery, ornaments), ecofacts (plant remains, animal bones), and paleoanthropological remains (hominin fossils). Absolute dating methods (radiocarbon, potassium-argon) and relative techniques (stratigraphy, typology) provide chronological frameworks. Ethnoarchaeology and experimental archaeology help interpret past behavior.
2 Human evolution
2.1 Early hominins
2.1.1 Australopithecus
The genus Australopithecus appeared in Africa around 4.2 million years ago. These hominins walked upright (bipedal) but retained ape-like skulls and small brains (c. 400–500 cc). Notable species include A. afarensis (Lucy) and A. africanus. They likely used simple tools of bone and stone, and their diet consisted of fruits, tubers, and possibly meat.
2.1.2 Homo habilis
Homo habilis ("handy man") lived from about 2.8 to 1.5 million years ago in East Africa. With a brain size of 600–700 cc, it is the earliest known species assigned to the genus Homo. It is associated with the Oldowan stone tool industry and shows increased manual dexterity. Debate continues over its role as a direct human ancestor.
2.2 The genus Homo
2.2.1 Homo erectus
Homo erectus emerged around 2 million years ago in Africa and was the first hominin to migrate extensively into Eurasia. It had a larger brain (c. 800–1100 cc), modern body proportions, and produced more complex Acheulean tools. Evidence of controlled fire appears at sites like Gesher Benot Ya’aqov (Israel, c. 780,000 years ago). Homo erectus persisted in Southeast Asia until about 100,000 years ago.
2.2.2 Archaic Homo sapiens
Archaic Homo sapiens refers to transitional populations between H. erectus and modern humans, living from about 600,000 to 200,000 years ago. They show increased brain size and more refined tool use. Key fossils include those from Sima de los Huesos (Spain) and Broken Hill (Zambia). They likely used fire regularly and had larger social groups.
2.2.3 Neanderthals and Denisovans
Neanderthals (Homo neanderthalensis) lived in Europe and western Asia from c. 400,000 to 40,000 years ago. They were robust, cold-adapted, and made sophisticated Mousterian tools. They buried their dead and possibly had symbolic behavior. Denisovans are known almost entirely from DNA extracted from a finger bone and teeth found in Denisova Cave (Siberia); they interbred with Neanderthals and modern humans.
2.3 Anatomically modern humans
2.3.1 Out of Africa theory
The prevailing model holds that Homo sapiens evolved in Africa around 300,000 years ago, based on fossils from Jebel Irhoud (Morocco) and Omo Kibish (Ethiopia). Around 60,000–70,000 years ago, a small population migrated out of Africa via the Bab el-Mandeb strait or the Sinai Peninsula, spreading along coastal routes into Asia.
2.3.2 Migration and dispersal
Early modern humans reached Australia by at least 60,000 years ago, Europe by 45,000 years ago, and the Americas by at least 15,000 years ago (via Beringia). This expansion led to replacement and admixture with local archaic populations (e.g., Neanderthals in Eurasia, Denisovans in Oceania). By the end of the last Ice Age, H. sapiens inhabited all continents except Antarctica.
3 Paleolithic (Old Stone Age)
3.1 Lower Paleolithic
3.1.1 Oldowan tool industry
The Oldowan industry, dating from c. 2.6 million years ago, consists of simple stone cores and flakes. Assemblages at sites like Olduvai Gorge (Tanzania) indicate that early hominins (Homo habilis) used these tools for butchering animal carcasses and processing plant foods.
3.1.2 Acheulean handaxes
Starting around 1.7 million years ago in Africa, the Acheulean industry introduced bifacial handaxes, cleavers, and picks. These teardrop-shaped tools were often symmetrical and required skill to produce. They persisted for over a million years, associated with Homo erectus and later hominins.
3.1.3 Control of fire
Evidence for controlled fire use appears at several Lower Paleolithic sites (e.g., Wonderwerk Cave, South Africa, c. 1 million years ago). Fire provided warmth, protection from predators, and allowed cooking, which increased the digestibility and nutritional value of food. It also extended the active day and fostered social interaction.
3.2 Middle Paleolithic
3.2.1 Mousterian technology
The Mousterian industry (c. 300,000–40,000 years ago) is primarily associated with Neanderthals in Europe and the Levant. It features prepared-core (Levallois) technique, yielding standardized flakes used as scrapers, points, and knives. This efficient method allowed greater control over tool shape.
3.2.2 Neanderthal culture
Neanderthals practiced deliberate burial (e.g., Shanidar Cave, Iraq; La Chapelle-aux-Saints, France), sometimes with grave goods. They also used pigment (ochre), carved bone, and possibly personal ornaments. Evidence suggests they cared for the injured and elderly. Their social structure likely involved small, mobile bands.
3.2.3 Early symbolic behavior
Engraved bones and shells from Middle Paleolithic contexts (e.g., Blombos Cave, South Africa, c. 100,000 years ago) indicate geometric patterns interpreted as early symbolic expression. Neanderthal sites also show engraved stones and use of pigments, suggesting complex cognition.
3.3 Upper Paleolithic
3.3.1 Blade technology
Upper Paleolithic industries (c. 50,000–10,000 years ago) are characterized by long, parallel-sided blades struck from prismatic cores. This method produced more efficient cutting edges and allowed the manufacture of specialized tools (burins, endscrapers, projectile points). The technique is associated with modern humans.
3.3.2 Cave art and figurines
Spectacular cave paintings (e.g., Lascaux, France; Altamira, Spain; Chauvet, France) date from c. 40,000 to 10,000 years ago. Depictions include animals, geometric signs, and rare human figures. Portable art includes Venus figurines (e.g., the Venus of Willendorf) carved from stone or ivory, possibly associated with fertility rituals.
3.3.3 Expansion into the Americas
The first peopling of the Americas is debated, but clear evidence exists from the Clovis culture (c. 13,500 years ago) in North America. Earlier sites like Monte Verde (Chile, c. 14,500 years ago) suggest pre-Clovis migrations. These groups exploited large game and adapted to diverse environments from Arctic to tropical zones.
4 Mesolithic (Middle Stone Age)
4.1 Environmental changes after the Last Glacial Maximum
After the peak of the last glaciation (c. 20,000 years ago), rising temperatures and sea levels altered landscapes. Forests expanded, megafauna (mammoths, woolly rhinoceros) went extinct, and coastlines were submerged. Human populations adapted by diversifying resources and reducing mobility.
4.2 Microlithic tools
Mesolithic toolkits feature tiny stone blades (microliths) often hafted into composite tools like arrows, harpoons, and sickles. This innovation allowed more efficient hunting and processing of plants. Examples include the Azilian (Europe) and Natufian (Levant) industries.
4.3 Sedentism and early fishing
Some Mesolithic groups, especially in resource-rich areas (e.g., coastal Scandinavia, the Danube Gorges), established permanent or semi-permanent settlements. They exploited fish, shellfish, waterfowl, and small game. The Natufian culture (c. 12,000 BCE) in the Levant shows stone-built houses and intensive cereal use, presaging agriculture.
5 Neolithic (New Stone Age)
5.1 The Neolithic Revolution
5.1.1 Domestication of plants
Around 10,000 BCE, in the Fertile Crescent, plants like emmer wheat, barley, lentils, and peas were domesticated through selection for larger seeds and non-shattering heads. This process occurred independently in other regions: rice in China (c. 7000 BCE), maize in Mesoamerica (c. 5000 BCE), and potatoes in the Andes.
5.1.2 Domestication of animals
Animals were domesticated for meat, milk, wool, transport, and labor. Goat and sheep domestication began in the Near East (c. 8000 BCE), followed by cattle and pigs. In Asia, the chicken was domesticated from red junglefowl, and the water buffalo in South Asia. The horse was tamed in the Eurasian steppes (c. 3500 BCE).
5.2 Early farming communities
5.2.1 Fertile Crescent (Jericho, Çatalhöyük)
Jericho (West Bank, c. 9000 BCE) had a permanent settlement with a stone tower and walls, indicating communal planning. Çatalhöyük (Anatolia, c. 7500 BCE) housed up to 8,000 people in densely agglomerated mudbrick houses, with roof access and interior shrines decorated with aurochs skulls and murals.
5.2.2 Other centers (China, Americas)
China’s Yellow River valley saw early millet cultivation (c. 6000 BCE) and the Yangtze region rice farming (c. 5000 BCE), leading to villages like Banpo. In the Americas, early farming (squash, maize) appeared in Mexico’s Tehuacán Valley (c. 5000 BCE) and the Andes (potatoes, quinoa, c. 4000 BCE). Domesticated crops spread gradually through trade and migration.
5.3 Social and cultural changes
5.3.1 Pottery and textiles
Pottery became common in the Neolithic for storage, cooking, and ceremonial use. The earliest known vessels date from Japan (Jōmon, c. 13,000 BCE). Weaving of flax, hemp, and later wool produced clothing and baskets. Textile impressions appear on clay, but direct finds are rare.
5.3.2 Megalithic structures
Large stone monuments were erected in Europe (megalithic tombs, menhirs, stone circles) from c. 4500 BCE onward. Examples include Newgrange (Ireland), Stonehenge (England), and the Carnac stones (France). Their function likely involved burial, ritual, and astronomical observation.
5.3.3 Emergence of trade
Neolithic trade networks exchanged exotic raw materials such as obsidian (from Anatolia or the Mediterranean), turquoise, seashells, and flint. Çatalhöyük and Jericho were nodes in regional exchange. The spread of domesticated plants and animals also reflects long-distance contact.
6 Chalcolithic (Copper Age)
6.1 Copper metallurgy
The ability to smelt copper from ores (e.g., malachite) emerged in the Near East around 5000 BCE. Early copper tools were produced by cold hammering and later by casting. The site of Pločnik (Serbia, c. 4500 BCE) shows copper axes and jewelry. Copper was valuable for ornaments and prestige goods but remained rare.
6.2 Early urban centers
Some Chalcolithic settlements grew into large agglomerations with specialized crafts and social hierarchy. Examples include Mehrgarh (Pakistan) and Tepe Sialk (Iran). In the Levant, Ghassulian culture (c. 4500–3500 BCE) had walled villages and copper objects. These sites foreshadowed the first cities of the Bronze Age.
6.3 Writing precursors (e.g., tokens, seals)
Administrative systems developed using clay tokens (e.g., at Susa, Iran) for counting goods. Cylinder seals and stamp seals used for marking property appear in Ubaid-period Mesopotamia. These systems represent the earliest forms of symbolic record-keeping, evolving into proto-cuneiform by the late 4th millennium BCE.
7 Bronze Age
7.1 Invention of bronze
7.1.1 Smelting and alloying
Bronze is an alloy of copper and tin (typically 10–15% tin). Its production required control of high temperatures and knowledge of tin sources. The earliest bronze objects date from the Near East (c. 3300 BCE). Compared to copper, bronze is harder, more durable, and easier to cast, enabling better weapons, tools, and art.
7.1.2 Regional bronze industries
Different regions developed distinct metallurgical traditions. In Mesopotamia, arsenical bronze was used early; later tin-bronze became standard. The Indus Valley yielded sophisticated bronze statuettes (e.g., the "Dancing Girl"). In Europe, the Unetice culture (c. 2300–1600 BCE) produced swords, axes, and jewelry. Shang China (c. 1500 BCE) created monumental ritual vessels.
7.2 Rise of state societies
7.2.1 Mesopotamia and the Indus Valley
Mesopotamia saw the emergence of city-states (Ur, Uruk) with centralized government, temples, and writing (cuneiform). The Indus Valley civilization (Harappa, Mohenjo-Daro, c. 2600–1900 BCE) featured planned cities, advanced drainage, and trade networks. Both had social stratification and organized religion.
7.2.2 Shang China
The Shang dynasty (c. 1600–1046 BCE) in northern China was a bronze-age kingdom with a hereditary monarchy. Its capital, Anyang, had royal tombs with chariot burials and human sacrifices. Shang society used a developed script (oracle bones) for divination and record-keeping.
7.3 Bronze Age collapse
Around 1200–1100 BCE, several complex societies (Mycenaean Greece, Hittite Empire, New Kingdom Egypt) experienced violent disruption, possibly due to a combination of climate change, earthquakes, invasions (the "Sea Peoples"), and internal unrest. This led to a period of regional depopulation and technological regression in some areas, followed by the Iron Age.
8 Iron Age
8.1 Iron smelting technology
Iron smelting requires higher temperatures than copper (c. 1500°C for pure iron). Early iron objects were produced in Anatolia (c. 1300 BCE) and spread via the Hittites. The Iron Age proper began when iron became cheaper and more abundant than bronze, often using local ores. Techniques such as bloomery smelting and carburization produced stronger steel-like materials.
8.2 Expansion of empires
The Iron Age saw the rise of large territorial empires that exploited iron weapons for military dominance. The Assyrian Empire (c. 900–600 BCE) deployed iron-edged swords, spears, and chariots. In China, the Zhou dynasty (c. 1046–256 BCE) introduced cast-iron agriculture tools and weapons. In West Africa, the Nok culture (c. 500 BCE–200 CE) used iron for tools and sculpture.
8.3 Prehistory evolving into history
8.3.1 Earliest writing systems
The transition out of prehistory occurred as writing systems emerged. Cuneiform in Sumer (c. 3400 BCE), Egyptian hieroglyphs (c. 3200 BCE), Indus Valley script (c. 2600 BCE), Chinese oracle bone script (c. 1250 BCE), and Mesoamerican scripts (Olmec, Zapotec, c. 600 BCE) mark the beginning of recorded history in their respective regions.
8.3.2 Transition to protohistory
Protohistory refers to periods where writing exists but is scarce, indecipherable, or limited to outsiders’ accounts. For example, the European Iron Age is often studied through Greek and Roman texts alongside archaeology. In many parts of the world, oral traditions and dated archaeological horizons provide a bridge before full literacy.