The philosopher John Rawls once said that 'the question of justice between generations...subjects any ethical theory to severe if not impossible tests.' This volume aims to illuminate those tests, indicate the progress made in resolving them, and take some steps of its own. It focuses on the increasing relevance of intergenerational ethics to key challenges of the 21st century, such as climate change, rapid technological change, the expanding human population, and threats of extinction. It features philosophers and political theorists of international standing, providing a cutting-edge perspective on these issues. Part A considers how intergenerational ethics should be understood from the point of view of leading contemporary moral and political theories, as well as approaches grounded in diverse cultural traditions. Topics include consequentialism, deontology, the ethics of care, contractualism, communitarianism, indigenous perspectives on ancestry, capabilities, republicanism, Buen