The armed conflict in Colombia is full of lessons for negotiated conflict resolution. Insofar as this has been a complex and long-lasting confrontation, the armed groups have now become protagonists. Their objectives as much as their use of violence has generated controversy about which actions or responses should be implemented to face such situations. Similarly to other countries, the players concerned have participated in several rapprochements, political dialogues or peace processes by contributing experience in negotiations that involve different sectors of the civil society, state players, the international community, and multilateral organizations. To that effect, it is relevant not only to retake the emergence, characterization and possible motivations of three of the biggest groups outside the law - paramilitary, ELN, FARC- which have participated in the conflict, but also to explore the rapprochement methods the Colombian government and its different administrations have employed with these groups. This way, we can fully understand the complexity and the multiple dimensions in the representation of various views of the conflict evolution and the short, medium, and long- term events in as much as this allows clarification of the continuity and discontinuity that have resulted in seeing the phenomenon from the standpoint of cultural causes, political complexities or economic perspectives.