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African Migration EssayThe African origin of early modern humans 200,000150,000 years ago is now well documented, with archaeologic data suggesting that a major migration from tropical east Africa to the Levant took place between 130,000 and 100,000 years ago via the presently hyper-arid Saharan-Arabian desert. The path out of East Africa leads across North Africa, by dint of the Nile corridor, and across the Red Sea, or across the Indian Ocean and the strait of Bab el Mandeb to the Arabian peninsula and beyond to Eurasia. Most of this interconnected land mass of the so-called Old World, the continental area encompassing Africa, Europe, and Asia, received migrants from East Africa by about 1. 5 million years ago.This migration was dependent on the situation of wetter climate in the region. Whereas there is good read that the southern and central Saharan-Arabian desert experienced increased monsoon precipitation during this period, no unequivocal evidence has been rig for a corresponding rainfall increase in the northern part of the migration corridor, including the Sinai-Negev land bridge between Africa and Asia.The major feature of world populations through time is their increasing numbers. It is likely that many early human migrations resulted from the pressure of such demographic increases on limited food resources disease, drought, famine, war, and natural disaster run into among the most important ca examples of early human migrations. Approximately 100,000 years ago, the first migrations of Homo sapiens out of their African homeland likely coincided with the ability to use spoken language and to control fire. Over the next 87,000 years humans migrated to every continent, encompassing a wide variety of natural environments. The Americas were the last continents to be reached by Homo sapiens, about 13,000 years ago.Why these earliest migrants left Africa to colonize the world is a complex, important question. The answer is likely to be found in a web of interrelated factors centered around human behavior, specifically behavior selected to reduce risk and increase the individuals fitness for survival. Calculated migration essential have resulted from information sharing, alliance building, memory, and the ability to negotiate all skills that necessarily accompanied increasingly complex social and cultural groups. The increasing complexity of cosmos inevitably led hominids out of Africa, resulting in a global distribution of diverse human groups.Increasing population may have prodded the migration of some groups. build up with the attributes of culture, the distinctive, complex patterns of behavior shared by human groups, humans eventually adapted to and conquered virtually all global environments. Whatever the nature of human origins, whenever or wherever human societies and cultures first appeared, the peopling of our globe has been a product of migration from place to place. Given the small numbers of people and the vas t distances they traversed, and considering their technologically limited modes of transportation, the performance of people around the globe seems miraculous.The examples of global colonization described below depended on interactions between people and between people and their environments. Gradually, sometime during the Middle match Age (perhaps 100,000 to 200,000 years ago), distinct patterns of interaction among humans and between them and the landscapes in which they lived emerged. Because the distinctive physical and social environments to which humans adapted were themselves constantly changing, cultures too continually changed. That early humans acquired technological and social skills can be inferred from widespread evidence of their material culturestone tools and utensils, carved figurines, rock and cave art, and the like, date from about 40,000 years agowhich has been found in most parts of the globe.The development of language unquestionably furthered the social and technological evolution of humans and facilitated systems of reciprocality and social exchange. For example, the division of labor in food production and the exchange and transportation of goods and products were greatly expedited by speech. Being able to assign unalike tasks to different individuals furthered cooperation and fueled the processes of social and cultural evolution.http//www.learner.org/courses/worldhistory/unit_readings_3.html http//www.learner.org/courses/worldhistory/unit_overview_3.html