This book provides a concise, critical analysis of the key themes, theories, and controversies in nationalism studies. It offers an historically informed and sophisticated overview of classical and contemporary approaches to nationalism, as well as setting out an agenda for future research on nationalism and the emotions. In so doing, the book illuminates nationalism's contemporary power and resilience, as manifested in the growth of far-right nationalist populism in Europe, the white ethno-nationalism of Trump in the United States, the resurgence of great power nationalism and rivalry in Asia, and the resilience of national secessionist movements in diverse parts of the planet. The widespread nationalistic responses to the coronavirus pandemic provide further confirmation of the continuing power of nationalism. All of these developments are discussed in the book, which will be an invaluable resource for nationalism scholars and students in Sociology, Politics and History.