Why did Britons get up a play wherever they went? Kathleen Wilson reveals how the performance of English theater and a theatricalized way of viewing the world shaped the geopolitics and culture of empire in the long eighteenth century. Ranging across the Atlantic, Indian and Pacific Oceans to encompass London, Kingston and Calcutta, Fort Marlborough in Sumatra, St. Helena and Port Jackson in New South Wales as well as London and provincial towns, she shows how Britons on the move transformed peripheries into historical stages where alternative collectivities were enacted, imagined and lived. Men and women of various ethnicities, classes and legal statuses produced and performed English theater in the world, helping to consolidate a national and imperial culture. The theater of empire also enabled non-British people to adapt or interpret English cultural tradition through their own performances, as Englishness became also a production of non-English peoples across the globe.