Abstract
Immigration has been a powerful force throughout the history of the United States. Consequently, immigration is an important social phenomenon, and a variety of theories have been developed to explain its relationship to human behavior and the social environment. The articles in this Special Issue explore theories of immigration from the social science disciplines of economics, political science, psychology, anthropology, and sociology and through the interdisciplinary perspective of transnationalism. This concluding analysis presents a synthesis of these multiple social science approaches in the form of a conceptual map to illustrate how these theories and disciplinary perspectives increase our understanding of immigration within the context of human behavior and the social environment.