The twentieth century has seen immense worldwide shifts in population. Whether it is Europe to North America, the Carribean to the United Kingdom, or East Asia to Australia, migration is one of the major factors that influences the global political and economic situation. By applying systematic theoretical frameworks to detailed empirical data, Worlds in Motion provides a unique overview of not only where migration occurs, and how it works, but crucially details the major factorsthat influence international population movement. (Oxford)