A defining component of Eric Hobsbawm’s historical writings is the quartet of “Age” books:Age of Revolution,Age of Capital,Age of Empire, andAge of Extremes. These are synthetic works, offering a narrative of the long nineteenth century and the short twentieth century. They give primary attention to developments pertaining to economic, political, and social change in Britain, Europe, and North America, with occasional commentary on the rest of the world (Asia, Africa, and South America)...