Pedro Trigo SJ is one of the most recognized theologians in Latin America today. A Jesuit originally from Spain, he became a Venezuelan citizen and is presently a professor at the School of Theology at Andres Bello Catholic University in Caracas. He is a research member of Centro Gumilla and chair of Jesuit socio–political studies in Venezuela. He has written numerous books and articles on theology, philosophy and Spanish literature for international journals and is a frequent participant in conferences and seminars throughout the world on liberation theology.

Peter D. Beaulieu, Ph.D. is a retired public servant living in Seattle, Washington. He is a founding member and executive director of the G.K. Chesterton Society of Seattle, a member of the Society of Catholic Social Scientists, a past member of the Seattle Archdiocesan Pastoral Council, and an instructor for the archdiocesan Catechetical Certification Program.

Peter M. Kalellis is a psychotherapist; a marriage and family therapist; and the author of Five Steps to Spiritual Growth, Restoring Relationships, and Restoring Yourself. He lives in Mountainside, New Jersey.

Peter Kalellis was born in Philadelphia in 1926, but grew up in Greece on the island of Lesbos, where he endured the Nazi occupation. He returned to America in 1946, where he earned advanced degrees in education and psychology from Princeton University and the Andover Newton School of Psychology. He is the author of many books on psychology and Eastern Orthodox spirituality.

Peter H. Van Ness, formerly Dean of Academic Affairs at Union Theological Seminary, New York City, and currently Visiting Associate professor of Religion at Columbia University, is the author of Spirituality, Diversion, and Decadence: The Contemporary Predicament.

Phil F. Lawler is the editor of Catholic World News and the author of The Alternative Influence: The Impact of Investigative Reporting on American Media and The Faithful Departed: The Collapse of Boston's Catholic Culture. He lives in South Lancaster, Massachusetts.

Philip Kaufman, a Benedictine monk for over 65 years, lived at Saint John's Abbey in Collegeville, Minnesota, and spent many years of his life giving comfort to Catholics through workshops on topics derived from his books. Father Philip, born in 1911, continued to write on controversial subjects including the formation of the New Testament until his peaceful death at Collegeville on January 8th, 2008.