Twenty-four ethnomusicologists from eleven countries (Australia` Austria, Canada, China, Finland, Malaysia, Slovenia, Sweden, Switzerland, United Kingdom, and United States), balanced in age and gender, have contributed to our Handbook. The chapters, all newly written for this volume, theorize applied ethnomusicology, offer histories, and detail practical examples, with the goal of stimulating further development in the field. Some authors present contrasting case studies that encompass two or more mutually distant places. Some discuss circumstances within their own geopolitical (state) unit, while others base their arguments on their research in faraway countries. Themes and locations of their research projects in applied ethnomusicology encompass literally all world continents. The variety of views, approaches, and methodologies contributes to the strength of the volume. Most of the chapters consider marginalized peoples and communities, their low status being based on ethnicity, economy, or caste affiliation. The addressed themes encompass a considerable range, from indigenous peoples and immigrants to conflict, education, archives, health, and the music industry, as well as advocacy, decolonization, activism, peace and conflict studies, ecology, sustainability, public folklore, and participatory action research. This volume 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 as well as other ethnomusicologists, all in a shared attempt to put the accumulated knowledge, understanding, and skills into good use for the betterment of our world.