Pope Francis, in chapter 7 of Fratelli Tutti, explains how to sort through the hardest kind of "encounter" - the kind between two countries, groups, or people who hate each other. He offers an outline of where to begin, what needs to be laid on the table, and what the beautiful fruit of such encounters can be. 

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https://www.vatican.va/content/francesco/en/encyclicals/documents/papa-francesco_20201003_enciclica-fratelli-tutti.html