The research presents the main themes of the theological-political thought of Johann Baptist Metz that serves as a matrix for rethinking the responsibility and praxis of fundamental theology. Such thinking not only addresses the issue of human suffering, but seeks to ground the commitment of Political Theology, the Church and Christianity as a foundational element of God s salvific project in the person of Jesus Christ. The structure of the dissertation is composed of three parts. Starting with a short biography of the author, discusses the term New Political Theology which undergoes a hermeneutics change rescuing it as an effective theological instrument. The second block deals with the applicability of Fundamental Theology, starting from the questions that surround the theme of theodicy in the post-Enlightenment context. The last part deals with the Memoria Passionis; the solidarity with the suffering of others cannot allow the pain to be forgotten, as well as the death of those who suffer should not be meaningless. The thesis sought to present the thought of Johann Baptist Metz highlighting three major thematic groups which certainly are not exhaustive, but indicative. The author s thinking plays an important role in the course of Christianity. His Political Theology is highly relevant and current to think theologically the unfair questions of society, such as inequality and the growing migration of people. It is hoped that the present work may arouse the interest of deepening in the thinking of this prolific author, who has much to contribute to the theology of Latin America and the world.