G. Pascal Zachary is a writer and researcher with expertise in migration, new forms of national and sub-national identities and the role of immigration in social and political change. He is the author of “The Diversity Advantage: Multicultural Identity in the New World Economy” (Westview, 2003). His current research includes studies of African diaspora groups in the U.S. and their role in their countries of origin. Zachary also has written and lectured widely on technology and economic development in sub-Saharan Africa and the role of technological elites in the emergence of the national-security state during and after World War II. His book “Endless Frontier,” a biography of Vannevar Bush, organizer of the Manhattan Project and architect of the U.S. military’s alliance with the scientific community, was called “the standard work” on the subject by The New Scientist. Zachary lives in Berkeley, Calif.