Liberation Theology is then a new way of doing Historical Theology in a particular locus theologicus: the historical present of Latin America, where a large portion of the population is oppressed by structures that deny them the possibilities to satisfy their needs and to develop. It arises from the spirit of "Gaudium et spes" of the Second Vatican Council and the social encyclicals of Pope John XXIII, and more specifically, the Episcopal Conferences of Medellín in 1968 and Puebla in 1978. Such a reflection on the Bible is supported on the historical present of a collectivity that desires liberation from oppression. There is a long biblical tradition about liberation that starts with the Book of Exodus.