Pope Benedict XV, born Giacomo della Chiesa in 1854, served as the head of the Roman Catholic Church from 1914 until his death in 1922. He became pope during the tumultuous times of World War I and is known for his efforts to promote peace and reconciliation among nations. His papacy focused on humanitarian efforts and addressing the suffering caused by the war. Benedict XV is also recognized for his support of missionary work and the modernization of the Church. He encouraged the use of modern communication methods to spread the Church's message and emphasized the importance of social justice. His encyclicals addressed various issues, including the role of the Church in the modern world.