Margaret Eletta Guider, OSF, is Associate Professor of Missiology at the Boston College School of Theology and Ministry. She is member of the Sister of St. Francis of Mary Immaculate and served as the Congregations Vice-President and councilor for Mission from 2008-2012. During the 1970s, she was lay missioner in the rural interior of Goias, Brazil. She is the author of Daughters of Rahab: Prostitution and the Church of Liberation in Brazil. She has served as an advisor and consultant for numerous religious institutes and missionary societies. She is past president of the American Society of Missiology O. Ernesto Valiente is Associate Professor of Systematic Theology at Boston College School of Theology and Ministry. He earned his PhD at the University of Notre Dame. His main areas of scholarly interest include political and liberation theology, and theologies of social reconciliation. He is author of Liberation Through Reconciliation: The Christological Spirituality of Jon Sobrino (Fordham University Press, 2016). A native of El Salvador, he currently lives with his wife and daughter in Watertown, MA. Felix Palazzi von Buren is Associate Professor at the Ecclesiastical Faculty of Boston College School of Theology and Ministry. He earned his Doctorate at the Pontifical Gregorian University and Post-Doctorate at the Julius Maximiliams Universitat in Wurzburg, specializing in Karl Rahner's Anthropology and Mariology. His scholarly interest include Eschatology, Anthropology and Mariology. He is the Author of "La Tierra en el Cielo: el Dogma de la Asuncion de la Beata Virgen Maria segun Karl Rahner", making available for the first time Rahner's most controversial manuscript on Mariology. He is native from Venezuela, where he has been Professor at the Jesuit's Universidad Catolica Andres Bello.
"Medellin was a profound, hopeful, and unforgettable spiritual experience of historical commitment and prayer; it was a strong call to solidarity with the "least of these who are members of my family [brothers and sisters]" (Matthew 25:40). It put us on the path of what Pope Francis calls "a poor church for the poor". It is a vision in which there is perhaps little "religion" but much of the Gospel." -- Gustavo Gutierrez, OP, Preface, The Grace of Medellin (2018)