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We adopt the perspective of deliberative democracy to analyze the “Dialogues for Peace” between the Mexican Federal Government and the Movement for Peace with Justice and Dignity. The origin of such exchange was a social movement that demanded the Mexican State to assume responsibility for the humanitarian consequences of President Calderón administration’s war on drugs. Our purpose is to evaluate the contributions of this episode to the strengthening of the deliberative features of politics in Mexico. We will show that this case is meaningful because of the exchange of reasons and justifications that took place between political actors with conflicting positions. This episode, however, also highlights the enduring difficulties that hinder deliberation to become a common and consequential practice in Mexico’s democracy.