When Fortune announced its list of the World's Greatest Leaders, the top spot was awarded not to a captain of industry, but to the pontiff of the Catholic Church. In the year since his election, Pope Francis has managed to breathe life into an aging institution, reinvigorate a global base, and create real hope for the future. How did a man who spent his life laboring in slums far from the Vatican achieve this so quickly? The answer lies in his humility and the simple principles that spring from it. Lead With Humility explores 12 of these principles and shows how leaders and managers can adapt