"A great deal of discussion is had about borders without there being much understanding of what they are and where they came from. Manlio Graziano makes clear the role of borders as symptoms of growing disorder rather than as causes."—Ronnie D. Lipschutz, University of California, Santa Cruz "This short book impressively synthesizes a vast range of knowledge about borders, both historical and geographical, into a coherent, accessible, and rigorous narrative. Providing a critical perspective on the so-called return of borders in the context of decades of globalizing tendencies, Graziano outlines the paradoxes of this 'return' while showing how and why globalization and the generation of borders are mutually implicated."—Brett Neilson, Western Sydney University "What is a Border? serves as a useful primer that leaves us with the realization that there is much to learn if we are to create more satisfactory political and social groupings for today's world."—Alexander Sager, H-Diplo, H-Net Reviews