Human societies and their politics are deeply rooted in the land. Land shapes politics through its material nature and distribution across society, by serving as a mechanism of control and state-building, and by acting as a symbolic site that imbues identity and belonging. That land is inextricably intertwined with politics makes it a crucial driver of a wide range of social, political, and economic outcomes. We explain and survey these rich and complex relationships, focusing on the formation of political preferences and identities, the forms and dynamics of political violence, and the long-term structure of society, ranging from patterns of settlement and dispossession to inequality, state capacity, and economic development and urbanization. Land access, land rights, and land tenure institutions are all implicated in these outcomes. We conclude with reflections on promising research frontiers in the study of land and politics, including climate change, migration, and urbanization.