Our dataset spans roughly 36,000 years of history, divided into eight major eras:
Upper Palaeolithic (~36,000–14,000 BCE) — ice-age hunters
Mesolithic (~10,000–6,000 BCE) — post-ice-age foragers
Neolithic (~6,000–3,500 BCE) — early farmers
Chalcolithic (~3,500–2,500 BCE) — copper age
Bronze Age (~2,500–800 BCE) — chariot peoples and kingdoms
Iron Age (~800 BCE–400 CE) — classical period
Roman Period (~1–400 CE) — empire era
Medieval (~400–1,200 CE) — early Middle Ages