Pope Francis was asked about corruption, which can be even more devastating to a country than outright violence.
"As Jesus "shook" the doctors of the law to break them free of their rigidity", the Pope said, the Holy Spirit "shakes" the Church so that its members not settle into a lazy comfort, but are constantly challenged by Christ and constantly reaching out.
Pope Francis also called on Trump to reconsider his decision to end the DACA program (Deferred Action on Childhood Arrivals), introduced by his predecessor Barack Obama, an amnesty for young people, known as "Dreamers", who were brought to the usa undocumented as children.
"Whoever denies it has to go to the scientists and ask them", Francis said.
Francis also said during the press conference that political leaders have a moral responsibility to follow scientists' recommendations and reduce carbon emissions in order to stem the effects of climate change. In order to find new paths to peace, he said, "the first step is to feel the pain of others, to make it our own, neither overlooking it or becoming inured to it".More news: Putin urges North Korea talks, says sanctions not working
Pope Francis has said that "history will judge" those who refuse to accept the science of climate change. This process remains "timely and necessary", he said, as "countless of our brothers and sisters continue to "thirst for peace".
"If we don't turn back, we will go down", Pope Francis told reporters ominously. He added that attachment to money "has effects on creation, and also on so many other questions, like that of arms".
Francis visited the Colombian cities of Bogotá, Villavicencio, Medellín, and Cartagena before returning to Rome. He bruised his cheekbone and cut his left eyebrow, blood staining his white cassock.
Pope Francis talked of peace and reconciliation as he sported an impressive black eye on his last day of his tour of Colombia.