Introduction: Attempts at conflict resolution in Colombia, 1986-1994 - - The historical context for bargaining : the weak Colombian state and the emergence of opposition - - Barco's guerrilla policy - - Barco's drug policy - - Self-defense, private justice, and paramilitary groups : the final piece of the jigsaw puzzle - - Negotiations between the government and the guerrilla groups - - Gaviria's drug policy - - The Gaviria policy for paramilitary groups - - Changing the Colombian state : constitutional and judicial reforms - - Conclusion: Assessment of success.