Indifferent toward religion as a young man, Anselm became one of the
Church's greatest theologians and leaders. He received the title "Father of
Scholasticism" for his attempt to analyze and illumine the truths of faith
through the aid of reason. His care and concern extended to the very poorest people; he opposed the slave trade. Anselm obtained from the national council at Westminster the passage of a resolution prohibiting the sale of human beings.
from Saint of the Day Catholic.org
I attended St Anselm College, a fairly traditional Benedictine school in Manchester, NH. This day was always celebrated, and we studied St Anselm's proofs of the existence of God.