Buenos Aires, Argentina – When torrential rains and flooding hit Argentina, leaving thousands homeless, the “Solidarity Network” founded by a social entrepreneur and Catholic layman named Juan Carr sprang into action. They positioned a large red truck in downtown Buenos Aires outside the Cathedral of Buenos Aires to collect food, clothes and other supplies for the flood victims, with a hand-painted banner reading: “You are not alone … the entire country embraces you!” This reflects the fact that the former occupant of the cathedral, now known to the world as Pope Francis, was a major supporter of Carr's concern for...