Map of the world showing approximate centres of origin of agriculture and its spread in prehistory: eastern USA (4000-3000 BP), Central Mexico (5000-4000 BP), Northern South America (5000-4000 BP), sub-Saharan Africa (5000-4000 BP, exact location unknown), the Fertile Crescent (11000 BP), the Yangtze and Yellow River basins (9000 BP) and the New Guinea Highlands (9000-6000 BP). A proposed centre of origin in Amazonia (Lathrap 1977) is not shown. Adapted from File:BlankMap-World6, compact.svg and Diamond, J. (2003). "Farmers and Their Languages: The First Expansions". Science 300: 597–603. DOI:10.1126/science.1078208. "Fig. 1"
Own work
Joe Roe