It is difficult to overestimate the impact that Pope Benedict XVI has had on the Catholic Church. He served the people of God as a priest, an advisor at the Second Vatican Council, a bishop, a cardinal, Prefect of the Congregation for the Doctrine of the Faith, and the 265th pope. But in addition to his influence as a churchman, Joseph Ratzinger also stands out as one of the most significant thinkers in recent history. He is the author of more...