Peter the Longest-serving Pope?

Source: USA Today:
The Vatican lists St. Peter, the first pope, as serving from A.D. 30 to 64 or 67 — a total of either 34 or 37 years. Second on the longevity list is Pius IX, who served 31 years, seven months and 22 days until Feb. 7, 1878. Third on the list is Pope Leo XIII, served 25 years, four months and 17 days until July 20, 1903.

Pope Benedict XVI's Deus Caritas Est

This is where Catholic social doctrine has its place: it has no intention of giving the Church power over the State. Even less is it an attempt to impose on those who do not share the faith ways of thinking and modes of conduct proper to faith. Its aim is simply to help purify reason and to contribute, here and now, to the acknowledgment and attainment of what is just.

Christian charitable activity must be independent of parties and ideologies.