To a world assaulted by private interests, this book argues that peace must be a public thing. Distinguished philosophers of peace have always worked publicly for public results. Opposing nuclear proliferation, organizing communities of the disinherited, challenging violence within status quo establishments, such are the legacies of truly engaged philosophers of peace. This volume remembers those legacies, reviews the promise of critical thinking for crises today, and expands the free range of thinking needed to create more mindful and peaceful relations. With essays by committed peace philosophers, this volume shows how public engagement has been a significant feature of peace philosophers such as Camus, Sartre, Dewey, and Dorothy Day. Today we also confront historical opportunities to transform practices for immigration, police interrogation, and mental health, as we seek to sustain democracies of increasing multicultural diversity. In such cases our authors consider points of view developed by renowned thinkers such as Weil, Mouffe, Conway, and Martín-Baró. This volume also presents critical analysis of concepts for thinking about violence, reconsiders Plato's philosophy of justice, and examines the role of ethical theory for liberation struggles such as Occupy!.