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In just a few months, Pope Francis has proven to be one of the most outspoken pontiffs in recent history, especially when it comes to poverty and income inequality. In a message to be sent to world leaders marking the Roman Catholic Church's World Day of Peace on January 1, he criticized the “widening gap between those who have more and those who must be content with the crumbs.” Francis is the first Jesuit to ascend to the papacy, so this week Bill turns to Jesuit-educated author and historian Thomas Cahill to get his perspective on the meaning of Pope Francis and the relevance of the Church in the 21st century. "[Pope Francis] is talking about the poor, as Jesus did. He's talking about the absolute necessity for us to take care of the poor, to do something for them." Cahill has written a series of best-selling books about critical moments in Western civilization; his latest is Heretics and Heroes: How Renaissance Artists and Reformation Priests Created Our World.