 Climate change has been linked to human migration from as early as the end of the Pleistocene to the early twenty-first century.The effect of climate on available resources and living conditions such as food, water, and temperature drove the movement of populations and determined the ability for groups to begin a system of agriculture or continue a foraging lifestyle.Groups such as the inhabitants of northern Peru and central Chile, the Saqqaq in Greenland, nomadic Eurasian tribes in Historical China, and the Natufian culture in the Levant all display migration reactions due to climactic change.