This article aims to explain the evolution and causes of violence in Colombia, presenting armed conflict as a way of expression. In relation to this conflict, the factors allowing the permanence of guerrilla movement in the country are analyzed. The guerrilla has been present in Colombia for four decades, before and after Cold War. In the same way, the factors influencing the breaking of peace process between Andres Pastrana?s national government and FARC are also analyzed. Then, the possibilities of a new negotiation in president Uribe?s government are discussed. Besides, a reflection about the historical difficulties common to peace processes in this country is made. In these events, a lack of coordination between civil and military functionaries have been the prevalent act.