By 2030, the UN predicts that 80 percent of the world population will live in urban areas, and cities will increasingly be the spaces where conflicts arise and related violence will occur. Dr. Beth Fisher-Yoshida and Dr. Aldo Civico will talk about their joint work with youth groups and community leaders from marginalized areas in Medellin, Colombia, that seeks to address the concrete reality in which they live, to understand the patterns and dynamics that produce the violent system in which they operate, and to imagine how to alter those patterns to move the system toward a nonviolent state.