David Harvey is one of the few global public intellectuals whose lifelong political and academic mission is the search for a more genuinely humanizing geography of everyday urban life. His relentless and thought-provoking engagement with the realities and contradictions of contemporary capitalist urbanization has long inspired those seeking to fight for an urban life free from the practices of social, political, and racial exclusion and the divisions that have been the hallmark of modern urbanization throughout the world. Harvey is one of the urban geographers whose intellectual influence has reached most widely across disciplines. With a Ph.D. in Geography from Cambridge University, he embarked on a lifelong intellectual and political trajectory that has transformed the ways in which urban theorists approach the capitalist city and in which activists seek urban, social, and political change. Already noted for the landmark publication in 1969 of Explanation in Geography, his epistemological and political attention soon turned to a more radical and Marxist understanding of the urban. This epistemological shift coincided with his transatlantic migration to the Johns Hopkins University, where he taught Marxist urban theory for the next fifteen years or so. The deep injustices that had just come to the boil in rioting US cities, combined with a rediscovery of the power of historical materialist Marxist analysis, resulted in the publication of Social Justice and the City (1973). Harvey’s theorization of the city, deeply embedded in the original writings of Marx, also draws on the radical urban theories and politics pioneered by Henri Lefebvre. For Harvey, cities are—and have always been—highly differentiated spaces of activity, excitement, and pleasure. They are arenas for the pursuit of unoppressed activities and desires, but also ones replete with systematic power, danger, oppression, domination, and exclusion. Exploring the tensions between this dialectical twin of emancipation and disempowerment has been at the centre of Harvey’s theoretical and political concerns. Questions of justice cannot be seen independently from the urban condition, not only because most of the world’s population now lives in cities, but above all because the city condenses the manifold tensions and contradictions that infuse modern life.