AfroEurasia

Afro-Eurasia is the combined landmass of Africa, Europe, and Asia, forming the largest contiguous continental region on Earth. The term is used in geography, archaeology, and geopolitics to emphasize the continuity of land routes, climates, and biomes across three major landmasses rather than political boundaries.

Geographically, Afro-Eurasia spans roughly two-thirds of the Earth's land surface and hosts the majority of the world's human population. It includes major mountain systems such as the Alps, Urals, Caucasus, Hindu Kush, and Himalayas; vast deserts like the Sahara and the Arabian; extensive steppes, plateaus, and river basins that have supported agriculture and urbanization for millennia.

Historically, Afro-Eurasia has been a conduit for long-distance exchange, enabling the spread of crops, technologies, religions, and ideas via networks such as the Silk Road, trans-Saharan routes, and Indian Ocean trade. Civilizations arose in river valleys and fertile basins across the landmass, from Mesopotamia and the Nile to the Indus and the Han and Roman worlds.

In modern usage, the concept underpins discussions of global connectivity, energy flows, and geopolitical strategy. The related idea of the World Island emphasizes that control of Afro-Eurasia has outsized strategic importance due to its population, resources, and transport networks.