The volume contains the text of the third Encyclical Letter of Pope Francis "on fraternity and social friendship" signed at Assisi on 3 October 2020. The title is inspired by the writing of St. Francis: "Let us all, brothers, consider the Good Shepherd who to save His sheep bore the suffering of the Cross"(Admonitions, 6, 1: FF 155) and is itself one of the focal points of the magisterium of Francis who from the evening of his election, March 13, 2013, presents himself to the world with the word "brothers". These brothers are the invisible ones he embraces in Lampedusa, the immigrants, in his first journey as a Pope. Also Shimon Peres and Abu Mazen who shook hands with the Pope in 2014 are also an example of that fraternity that had peace as its goal. Until last year's Declaration at Abu Dhabi, also in this case a document on "human fraternity" which, according to Francis, "comes from faith in God who is Father of all and Father of peace".