Made popular by John Rawls, ideal theory in political philosophy is concerned with putting preferences and interests to one side to achieve an impartial consensus and to arrive at a just society for all. In recent years, ideal theory has drawn increasing criticism for its idealised picture of political philosophy and its inability to account for the challenges posed by inequalities of, for example, race, gender, and class and by structural injustices stemming from colonialism and imperialism. The Routledge Handbook of Non-Ideal Theory is the first handbook or reference source on this important and fast-growing debate. Comprised of 34 chapters by an international team of contributors, the Handbook is divided into three clear parts: Methodological Challenges Intersections Applied Issues and Contemporary Challenges Within these sections key topics are addressed including: the question of whether non-ideal theory is methodologically linked to ideal theory; its intersection with feminist philosophy, critical race theory, decolonial theory, and critical theory; its characteristic features; the role of the non-ideal theorist; its relation to activism; and its application in the context of disability and health studies, climate justice, global injustices, colonialism, and many more. As well as a comprehensive introduction which provides important background to the debate between ideal and non-ideal theory, the Handbook also features a contribution by the late philosopher Charles Mills on non-ideal theory as ideology. The Routledge Handbook of Non-Ideal Theory is essential reading for students and scholars of political philosophy, ethics, and political theory, and will also be of interest to those studying and researching related subjects such as gender, race, and social justice.