Throughout the modern age, revolutions have spread across state borders, engulfing entire regions, continents, and, at times, the globe. Revolutionary World examines the spread of upheavals during the major revolutionary moments in modern history: the Atlantic Revolutions, Europe's 1848 revolts, the commune movement of the 1870s, the 1905-15 upheavals in Asia, the communist revolutions around 1917, the 'Wilsonian' uprisings of 1919, the 'Third World' revolutions, the global Islamic revolt of 1978-79, the events of 1989, and the rise and fall of the 'Arab Spring'. The chapters explore the nature of these revolutionary waves, tracing the exchange of radical ideas and the movements of revolutionaries around the world. Bringing together a group of distinguished historians, Revolutionary World shows that the major revolutions of the modern age, which have so often been studied as isolated national or imperial events, were almost never contained within state borders and were usually part of broader revolutionary moments.