The below is but a short section of the information on LT from Maryknoll/Orbis books @:
landreform.org/boff2.htm
*As far back as 1971, the final document “Justice in the World,” the topic of the second ordinary assembly of the Synod of Bishops, already showed traces of liberation theology. Its echoes had become much stronger by 1974, at the third assembly of the Synod, on “Evangelization of the Modern World.” The following year, Paul VI devoted fifteen paragraphs of his apostolic exhortation Evangelii Nuntiandi to the relationship between evangelization and liberation (nos. 25-39). This discussion forms the central core of the document, and without attempting to summarize the Pope’s position, we can just say that it is one of the most profound, balanced, and theological expositions yet made of the longing of the oppressed for liberation.
The magisterium has also produced the "Instruction on Some Aspects of Liberation Theology, " under the auspices of the Prefect and Secretariat of the Congregation for the Doctrine of the Faith, dated August 6, 1984, and published September 3. The main points about this document are its legitimation of the expression and purpose of liberation theology, and its warning to Christians of the risk inherent in an uncritical acceptance of Marxism as a dominant principle in theological endeavor. The subject had been studied in Rome since 1974, and had been the concern of innumerable sessions of the International Theological Commission, though it did not publish my results until 1977, when it produced a “Declaration on Human Development and Christian Salvation” (included as an appendix in Kloppenburg’s book mentioned above), which shows a grasp of the questions such as was to be expected from such an august theological body.
The magisterium of the church in Latin America has expressed itself primarily through the documents of two conferences. The second general conference of the episcopate of Latin America, held at Medellin, Colombia, in 1968, spoke of the church “listening to the cry of the poor and becoming the interpreter of their anguish”; this was the first flowering of the theme of liberation, which began to be worked out systematically only after Medellin. The third general conference, held at Puebla, Mexico, in 1979, shows the theme of liberation running right through its final document. The liberation dimension is seen a an “integral put” (§§355, 1254, 1283) of the mission of the church, “indispensable” (§§562, 1270), “essential” (§1302). A large put of the document (§§470-506) is devoted to evangelization, liberation, and human promotion, and a whole chapter (§§1134-56) to the “preferential option for the poor,” a central axis of liberation theology.
The general tenor of the pronouncements of the magisterium, whether papal or coming from the Synod of Bishops, has been to recognize the positive aspects of liberation theology, especially with reference to the poor and the need for their liberation, as forming put of the universal heritage of Christian commitment to history. Criticisms of certain tendencies within liberation theology, which have to be taken into account, do not negate the vigorous and healthy nucleus of this form of Christian thinking, which has done so much to bring the message of the historical Jesus to the world of today.*