Pope John Paul II declares Duns Scotus a saint. Known by many as "The Subtle Doctor," John Duns Scotus was a Franciscan theologian and philosopher who wrote extensively on topics such as the nature of will, the importance of reason and knowledge, and the necessity of divine revelation. His work was very influential on scholasticism because he treated theology as a scientific subject.
Another area where Duns Scots was very influential was the doctrine of the Immaculate Conception. He championed it when many others had long opposed it. The opponents' argument was that if Mary had been conceived without sin, she would not have needed redemption. Scotus argued that her sinlessness was due to the grace of Christ, the first instance of his redemptive powers.