The Ethics of Toleration: Locke's Letter Concerning Toleration and the Emergence of Religious Pluralism as a Social and Epistemic Virtue offers a compelling and timely exploration of one of the most enduring challenges of human coexistence—the management of difference. Tracing the origins of modern toleration from John Locke's seminal 1689 Letter through its profound influence on Enlightenment thinkers, nineteenth-century liberalism, and contemporary debates, this book reveals how toleration evolved from a political necessity to a vital social and epistemic virtue. With deep historical insight and rigorous philosophical analysis, the author uncovers the tensions and limits in Locke's vision, including his exclusions of Catholics and atheists, and shows how subsequent thinkers expanded and contested his ideas. The book further examines how the principles of toleration have been stretched to encompass race, gender, and sexuality, while confronting new global challenges such as religious fundamentalism and cultural conflicts. Bridging classical theory and modern practice, the book highlights the transformative power of interfaith dialogue and the ongoing quest for a robust pluralism that embraces difference while sustaining social cohesion. Richly contextualized and accessible, this work speaks to scholars, policymakers, and general readers alike, offering profound lessons for navigating today's fractured world. The Ethics of Toleration is an essential guide to understanding how the ideals of freedom, respect, and dialogue—rooted in Locke's revolutionary thought—can inspire more inclusive, peaceful, and enlightened societies in the twenty-first century.