This volume explores the many and deep connections between the widespread rise of authoritarian leaders and populist politics in recent years, and the domain of environmental politics and governance – how environments are known, valued, and managed; for whose benefit; and with what outcomes. The volume is explicitly international in scope and comparative in design, emphasizing both the differences and commonalties to be seen among contemporary authoritarian and populist political formations and their relations to environmental governance. Prominent themes include the historical roots of and precedents for environmental governance in authoritarian and populist contexts; the relationships between populism and authoritarianism and extractivism and resource nationalism; environmental politics as an arena for questions of security and citizenship; racialization and environmental politics; the politics of environmental science and knowledge; and progressive political alternatives. In each domain, using rich case studies, contributors analyse what differences it makes when environmental governance takes place in authoritarian and populist political contexts. This book was originally published as a special issue of Annals of the American Association of Geographers.