A rising number of public and nongovernmental organisation (NGO) leaders are employing the arts in efforts aimed at encouraging social change. Meanwhile, scholars have offered a number of theories concerning the character of political agency and its exercise, and contended that effective use of the arts may result in individual and group epistemic change. Far fewer analysts, however, have married such theorisations of aesthetics with empirical investigations of how professionals actually use the arts to promote such shifts. This article addresses this concern by studying the strategies adopted by two international nongovernmental organisations (INGOs), American Voices and Bond Street Theatre, that have worked to encourage peace through music and theatre-making in light of changing conceptions of agency and the power of aesthetics to stimulate its exercise. We outline the approaches these NGOs adopt to do so and the mechanisms by which their leaders believe their work catalyses changes in values at the individual and community levels. We argue that understanding these dynamics more thoroughly and in light of conceptions of agency and aesthetics leads to a stronger theorisation of whether and how arts-based peacebuilding efforts can lead to sustainable community cultural change.