The nine ethnomusicologists who contributed to this volume, balanced in age and gender and hailing from a diverse array of countries, share the goal of stimulating further development in the field of ethnomusicology. By theorizing applied ethnomusicology, offering histories, and detailing practical examples, they explore the themes of peace and conflict studies, ecology, sustainability, and the theoretical and methodological considerations that accompany them. Theory, Method, Sustainability, and Conflict is the first of three paperback volumes derived from the original Oxford Handbook of Applied Ethnomusicology, which can be understood as an applied ethnomusicology project: as a medium of getting to know the thoughts and experiences of global ethnomusicologists, of enriching general knowledge and understanding about ethnomusicologies and applied ethnomusicologies in various parts of the world, and of inspiring readers to put the accumulated knowledge, understanding, and skills into good use for the betterment of our world.