Could it be that playing marimba music is an act of resistance? Could it be a peace practice? Are musicians from the South Colombian Pacific coast performing peace by playing their vernacular music? These pages are concerned with those questions, and also with the reflections about the concept of peace that they trigger. Through an ethnographical research, this book attempts to grasp peace as an active practice of self-assertion exercised in the daily life of the musicians from a traditionally alienated region in Colombia.