Immigration remains the most controversial component of globalization. In a provocative new book, British author Philippe Legrain presents a comprehensive case for expanding the freedom of workers to cross international borders legally, especially from less‐ to more‐​developed countries. With an American audience in mind, Legrain examines the economic benefits of both high‐​skilled and low‐​skilled immigration and addresses the very concerns that blocked Senate passage of comprehensive immigration reform earlier this year. Among the questions the book seeks to answer: Is Latino immigration splitting America in two? Do Mulsim immigrants threaten our security and way of life? Comments will be provided by a leading U.S. immigration expert.