This book is a journey that begins in the 1980s and ends in 2016 to discover how collective peacebuilding initiatives emerged in Medellin, Colombia. Amidst contexts of national and local violence, this study adopted an ethical and political approach. Therefore, it starts with the contextualization of peace in discourses and practices and situates the contexts of violence in different periods. Afterward, it focuses on the experiences of three peacebuilding initiatives in Medellin: the Permanent Human Rights Commission in Antioquia, the Alternative Plan of the Northeastern Side (Plan Alternativo Zonal de la Nororiental, PAZ), and the platform Memorias en Dialogo. These experiences teach lessons that acknowledge the current importance of real democracy as one of the biggest challenges of our time because, regardless, these organizations still trust humanity.