In 1951 the Institute of Social Sciences was founded within the Faculty of Philosophy by Raimondo Spiazzi (1918–2002). Spiazzi, a prolific author and editor of the works of Aquinas, completed his doctorate in Sacred Theology at the "Angelicum" in 1947 with a dissertation entitled " "Il cristianesimo perfezione dell'uomo". Spiazzi directed the Institute of Social Sciences until 1957 and continued teaching there until 1972. This Institute was established as the Faculty Faculty of Social Sciences (FASS) in 1974. Mieczysław Albert Krąpiec, leading exponent of the Lublin School of Philosophy in Poland, received a doctorate in theology from the "Angelicum" in 1948.