Factors that facilitate or hinder political, social, and economic incorporation of immigrants are examined. In addition to reviewing the early twentieth century theories of immigration in the discipline of sociology, contemporary research on immigration in political science and related disciplines are analyzed. While the course focuses primarily on explaining the patterns of incorporation of immigrants in the United States and Europe, it also compares cases from Latin America, Eurasia, the Middle East, and other regions that have different, or share similar, immigration policies, the level of economic development, and demographic composition.