Tolerance is widely regarded as a virtue - of both individuals and groups - that modern democratic and multicultural societies cannot do without. The historical emergence and growth of religious toleration is often seen as an important precondition for the development of political and legal institutions that aim to respect different ideas of the good in society. But the exact nature, limits and forms of expression of toleration are not beyond contestation. The very formulation of the ideal of tolerance is said to give raise to a moral paradox: why tolerate ideas, behaviour and practices that one believes to be wrong? The first part of this collection traces the passage of toleration from a moral to a political virtue, which may contribute to avoid such a paradox. Political toleration asks not that people accept the reasons or actions of others, to whom they may strongly object, but rather that they reassess and revise their own reasons for opposition and repression in the light of public reason. Such a shift to the political perspective brings, however, new theoretical and institutional problems relating in particular to the nature of political neutrality and the working of democratic institutions. The second and third parts of the volume attempt to clarify the terms of the debate on political toleration. The book brings together a group of international scholars, many of whom have already contributed to the debate on toleration, and who are offering fresh thoughts and approaches to it. The essays of this collection are written from a variety of perspectives: historical, analytical, normative, and legal. Yet, all authors share a concern with the sharpening of our understanding of the reasons for toleration as well as with making them relevant to the way in which we live with others in our modern and diverse societies.