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Amid the negative rhetoric of some presidential candidates who seek to exploit the issue of undocumented immigrants, it is important to keep in mind a larger view of “people on the move.” What is happening in the United States represents just a small part of a worldwide phenomenon.

A major reason for migration lies in economics. Of special note is the extreme disparity in wages between countries in the developing world and in the developed world. The This article appears in January 7 2008.