Homo sapiens arose in Africa during late Middle Pleistocene. Dispersals reached all continents except Antarctica by Late Pleistocene end. Process shows dynamic behavioral variability and population interbreeding. Simple single-wave narratives fail against evidence. Hybrid models needed for Eurasia expansion. Early Homo erectus dispersals outside Africa limited and discontinuous. Hominid expansion constrained by latitude and climate. Two Homo sapiens sapiens dispersals from Africa around 100kya and 50kya. First wave settled tropical Eurasia to Australia 60kya. Neanderthal and Denisovan contact confined advance beyond tropics. Second wave sourced Upper Paleolithic and most Eurasian languages. African climate shifts drove evolution and dispersals. Southern Africa refuge flowered symbolic behavior 100-70kya. Cultural transmission from south to east Africa around 70ka triggered global expansions. Deep genetic split separates Khoe-San from all other humans. Multiple pre-60kya dispersals evident in Asia. Modern humans interbred with Neanderthals, Denisovans, and mid-Pleistocene Homo. Early plant processing aided Sahul colonization 65-53kya. Levantine occupations alternated between Homo sapiens and Neanderthals. Arabia hosted at least five hominin expansions during green phases.