The North Atlantic is best considered as an increasingly integrated economic and social region during the late nineteenth century, and this approach helps to clarify Ireland’s geopolitical place during the ideologically tumultuous 1880s. Using this framework, this chapter explores the place of Henry George and of the Irish Land War in this fractious period, detailing how technological and political developments reshaped long-standing assumptions. It explains how the Land War became an international event, with significance extending far beyond Ireland itself. The chapter also recounts George’s intellectual biography, setting the scene for the development of his most famous work, Progress and Poverty. The reaction to this book is assessed, particularly the most common arguments made by critics, and the ways in which these critiques developed commonalities across the political spectrum.