As the Pope’s South American tour finishes he comes back to Italy. Pope Francis left for Rome on Sunday at the end of a trip to South America during which he censured capitalism, championed the rights of the poor, warned of irreversible damage to the planet and urged youths to "make a mess", Reuters reported. In passionate speeches, the Argentine pontiff urged the destitute to change the world economic order and branded the unfettered pursuit of money as the "dung of the devil". He also sought forgiveness for the sins committed by the Catholic Church against native Americans during the colonial era. At a final rally in Paraguay, Francis urged tens of thousands of youths to look after their less fortunate peers and fight for a dignified life filled with hope and strength. "They wrote a speech for me to give you. But speeches are boring," the Argentine pontiff said to loud cheers, casting aside his script. "Make a mess, but then also help to tidy it up. A mess which gives us a free heart, a mess which gives us solidarity, a mess which gives us hope." It was not the first time Francis has called on young people to shake things up, repeating a mantra he voiced in Brazil in 2013 when he urged youngsters to demand a more outward-looking Catholic Church. "We don't want young weaklings. We do not want young people who tire quickly, who live life worn out with faces of boredom. We want youths with hope and strength," Francis told the crowd, as night fell over the banks of the Paraguay River outside the capital Asuncion. Earlier on Sunday the pope heard harrowing tales of life in a flood-prone shantytown and appealed to the slum dwellers, many forced from their farms and now squatting on city land, to stay united in their struggle for better living and working conditions. The Argentine pontiff made defending the poor a major theme of his "homecoming" trip, which also took him to Ecuador and Bolivia, ranked among Latin America's poorest countries. On Saturday night, he said world leaders charged with promoting economic development must ensure it had a "human face" and denounced corruption as the "gangrene of society". In Banado Norte, murals adorned the walls of houses made of corrugated metal, wood and cement blocks. One of them read: "Yes to life, no to drugs, fight for change." "We built our neighborhoods inch by inch, overcoming difficult terrain, floods and hostile public authorities," ," Maria Garcia, a local organizer, told him. "It's been a tough fight to put up a home in the midst of hardship, but we never gave in nor let ourselves be swept away by sadness."