Fr Cristian Mendoza is an associate professor in the School of Theology at the Pontifical University of the Holy Cross in Rome. His area of expertise lies in Catholic Social Teaching and he teaches in the School of Church Communications a course on the economic dimension of the Catholic Church. Monsignor Lluís Clavell is a professor emeritus of Metaphysics, former rector of the Pontifical University of the Holy Cross and former president of the Pontifical Academy of St Thomas Aquinas. He is advisor for the Pontifical Council for Culture, and member of the governing board of the Aquinas International Society.