Marshall B. Rosenberg, PhD founded and was for many years the Director of Educational Services for the Center for Nonviolent Communication, an international peacemaking organization. He authored 15 books, including the bestselling Nonviolent Communication, which has sold more than one million copies and has been translated into more than thirty languages. Magiarí Díaz Díaz is a Certified Nonviolent Communication Trainer, translator and professional interpreter with a master's degree in peace and conflict transformation from the University of Innsbruck in Austria. Alan Rafael Seid Llamas began studying the CNV in 1995 with Dr. Marshall Rosenberg. Alan received certification as a trainer in 2003, and works privately in areas of social change, personal development, and leadership.