Cross-border movements are often discussed as a high-level abstraction, but people cross borders as individuals. Their lives are reshaped by the experience, and in some cases they in turn reshape their own environment. For the ten individuals whose biographies appear in this volume, travel and its contingent and uneven processes of translation, circulation, and exchange helped forge patterns of political thought and action, and defined their contribution to the process of nation-making in Southeast Asia. Mariano Ponce, Pham Hong Thai, Hilaire Noulens, Vu Trong Phung, Du Ai, Lin Bin, Ruam Wongphan, James Puthucheary, K. Bali, Connie Bragas-Regalado, and Imam Samudra each traveled within and beyond Southeast Asia. The accounts in this book discuss how travel shaped their lives and careers, and explain the transformative effects it had on the intellectual, political, and cultural trajectories of nationalism, communism, Islamism, and other movements in the region. The volume illuminates some of the pathways by which people in this region worked to realize their intellectual, aesthetic and political visions and projects over the last tumultuous century.