Liberation theology is a school of theology within Christianity, particularly in the Roman Catholic Church. Two of the starting points of Liberation theology are, first, the question of the origin of sin; and secondly, the idea that Christians should make good use of the talents given by God, and that includes intelligence in a general sense, and science in particular. Therefore, these theologians use sociology and economics sciences to understand poverty, since they considered poverty was the source of sin. The methodologies derived from historical materialism, which influenced the development of Liberation theology. They then read the Bible from the new perspective and developed the ethical consequences that led many of them to an active participation in the political life, and to focus on Jesus Christ as not only the Redeemer but also the Liberator of the oppressed. It emphasizes the Christian mission to bring justice to the poor and oppressed, particularly through political activism. Some elements of certain liberation theologies have been rejected by the Catholic Church.