 Known for his prodigious philosophical production, Fabro was part of the scholastic revival of Thomism.One of his major contributions to twentieth-century philosophy was to draw attention to the notion of "participation" in Aquinas' metaphysics.Fabro was also interested in modern philosophy, particularly the relationship Kierkegaard's thought to Christian philosophy, the origins and nature of anthropocentrism in modern thought, and the critical analysis of "progressive" theology.