This seminar familiarizes students with theories and global histories of one of the most formidable forces in shaping our contemporary world: nationalism; a movement, principle, discourse, or ideology that after several decades of swan songs has recently witnessed a powerful resurgence. The course starts with an interdisciplinary introduction to the most common theoretical approaches to the study of nationalism. The longer second part enquires about the reasons behind the global spread of nationalism, discussing case studies from Europe, Asia, Africa, and Latin America since the early nineteenth century. We will also engage with recent revisionist approaches to the study of imperial decline and nation-state formation, which have stressed the unforeseeable and contingent nature of transitions from empire to nation, especially in the Habsburg and French colonial setting. The ultimate aim is to provide students with a firmer grasp of how manifold forms of nationalism have molded our contemporary world.