Pope John Paul II promulgated Redemptoris Missio (Mission of the Redeemer) in 1990. The encyclical is an urgent call for the Church to renew her commitment to evangelize the world. The letter is divided into two parts. The first part, made up of three sections, "Jesus Christ, The Only Savior," "The Kingdom of God," and "The Holy Spirit: The Principal Agent of Mission," presents a theological defense for the imperative of evangelization. The second part, made up of five sections, "The Vast Horizons of the Mission ad Gentes," "The Paths of Mission," "Leaders and Workers in the Missionary Apostolate," "Cooperation in Missionary Activity," and "Missionary Spirituality," provides guidelines for the application of the theology of mission to the contemporary Church.