Book excerpt: This timely book introduces readers to the central question of borders in the twenty-first century. After familiarizing readers with border thinking and making from antiquity to the present, Gabriel Popescu turns a critical eye on current border-making concepts, processes, and contexts. Throughout, he offers a balanced understanding of borders, explaining why and how interstate borders have emerged, whose interest they serve, who is involved in border making, and how border-making practices affect societies. Assessing the latest theoretical approaches to border studies, the author deftly incorporates a range of disciplinary perspectives, including geography, international relations, sociology, history, security studies, and anthropology. Popescu exploresrecent world events, discussing how current issues such as migration, terrorism, global warming, pandemics, the human rights regime, outsourcing, the economic crisis, supranational integration, regionalization, and digital technology relate to borders andinfluence our lives. Written with a clear eye and voice, this book makes a complex subject accessible to a wide readership.