Harshly exploited migrant labour plays a fundamental role in the political economy of contemporary capitalism. The abstract and utopian theorising of many liberals and leftists on the migration question often ignores or downplays patterns of displacement and brutal class dynamics, which divide and weaken working people while empowering the ruling class. In this important new book, Hannah Cross provides a sober analysis of the class antagonisms of migration in the context of the nation, social democracy, and the racialized ordering of the world. Bringing Marxist methodology and strategy to a careful analysis of existing emancipatory movements, she sets out the programmes and approaches that are needed to promote global worker solidarity and create a future in which cheap labour is no longer a mainstay of wealthy economies. This focus on the labouring classes allows her to identify some important new directions for migration in a world beyond capitalism, exploitation and injustice. This book will be essential reading for students, scholars and general readers interested in the politics and political economy of migration in a world unhelpfully caught between racist authoritarian capitalism and the wishful-thinking of contemporary left-liberalism.