In his first major publication since taking office, Pope Francis has urged world leaders to fight poverty and growing inequality.
The pontiff formulated many of his ideas while working in the shanty towns of his native Argentina. But people living in his former work place will also be asking how well-meaning words written on the other side of the world will have an impact on their lives.
Al Jazeera's Daniel Schweimler reports from Buenos Aires.
Source: Al Jazeera