Islands of Development in Subsaharan Africa.Adapted with permission from: Peter J. Taylor and Colin Flint, Political Geography: World-Economy, Nation-State and Locality, 4th ed., New York: Prentice Hall, 2000.Human Geography (10th) by H.J.de Blij (Wiley) - 96page To understand migration flows from one poor country to another, it is not sufficient to analyze the flow at the global scale. We need ..