"You are brothers who speak the same language. When you speak the same language in a family, there is also a human hope."
Celebrating Mass before some 50,000 people, Pope Francis prayed that Christian values overcome demoralization in economically successful societies.
"The hope held out by the Gospel is the antidote to the spirit of despair that seems to grow like cancer in societies which are outwardly affluent yet often experience inner sadness and emptiness," the pope said Friday in his homily at the World Cup Stadium in Daejeon.
Pope Francis formally asked U.N. agencies and the entire international community "to take action to end the humanitarian tragedy now underway" in northeastern Iraq.
In a letter signed Aug. 9 but released by the Vatican after it had been delivered, Pope Francis told U.N. Secretary-General Ban Ki-moon immediate action was needed "to stop and to prevent further systematic violence against ethnic and religious minorities."
Francis Chronicles: "One cannot generate hatred in God's name," Pope Francis said Sunday. "One cannot make war in God's name!"
Pope Francis is dispatching Cardinal Fernando Filoni as his personal envoy to northern Iraq, where Islamist militias have sent thousands of Christians and other religious minorities fleeing for their lives, the Vatican said Friday.
The Vatican announced the appointment of Filoni, a former papal nuncio to Iraq and Jordan, only a day after the pope launched a fresh appeal for the welfare of Christians affected by the violence there.
The pope also made a "pressing appeal to the international community to take initiatives to put an end to the humanitarian drama underway."
However, the sign of peace can be omitted "if it is foreseen that it will not take place properly."
The removal suggests that priests suspected of child abuse in one country can no longer find shelter in other countries.
Philadelphia Archbishop Charles Chaput said Pope Francis has accepted his invitation to attend the World Meeting of Families in the U.S. next year.
Meriam Ibrahim, her husband and her two children met with Pope Francis, who thanked her for her steadfast witness to Christ.