Paleolithic migration prior to end of the Last Glacial Maximumspread anatomically modern humans throughout Afro-Eurasia and to the Americas.During the Holocene climatic optimum, formerly isolated populations began to move and merge, giving rise to thepre-modern distribution of the world's major language families. In the wake of the population movements of the Mesolithic came the Neolithic revolution,followed by the Indo-European expansion in Eurasia and the Bantu expansion in Africa.