Samuel Ruiz GarcĂa was a Mexican Roman Catholic prelate who served as bishop of the Diocese of San CristĂłbal de las Casas, Chiapas, from 1959 until 1999. Ruiz is best known for his role as mediator during the conflict between the Zapatista Army of National Liberation (EZLN) and the Institutional Revolutionary Party (PRI), a Mexican political party which had held power for over seventy years, and whose policies were often