A pioneer of political theology, ecological theology, and post-Holocaust Christian theology, Moltmann was perhaps best known for his 1964 book, Theology of Hope: On the Ground and Implications of a Christian Eschatology, published in English in 1967.
The book radically reframed eschatology, traditionally understood as the Christian doctrine of “the last things,” to focus on the ground of hope in Christian faith and the responsible exercise of this hope in thought and action in the world today.
The book quickly gained international renown, spawned a decades-long readership both academic and lay, and exerted strong influence in the churches and preaching.
During Moltmann’s last visit to the WCC in Geneva in 2019, he offered a lecture on “The Spirit of Truth” to mark publication by the WCC of his book, Hope in These Troubled Times.
“The fight for truth against falsehood is a matter of life and death. It is the struggle for the survival of humankind,” Moltmann said in his lecture.
“Nationalist power politics is no longer interested in truth,” he said. “They wage war under the guise of peace, a hybrid form of war with economic sanctions and cyber wars, fake news and lies.”
Church of Norway Presiding Bishop Rev. Dr Olav Fykse Tveit, who was the WCC’s general secretary from 2010 to 2020, said of Moltmann, “My heart is filled with sadness and deep gratitude as I learn about the death of Jürgen Moltmann. His life and work as a theologian, teacher and leader for the churches in the last decades, are a great and unique gift to the ecumenical fellowship.”
He continued, “Moltmann has articulated the challenges and the profound answers to them from a unique competence and a deep theological reflection, carrying forward a faith and love to the triune God, to God`s creation, to the one humanity, and to the church and their fellowship. For me personally he has been and will be a teacher and guide in our work as theologian and church leaders, and I will always remember the lovely encounters and conversations with him.”
The originality and depth of Moltmann’s work and the breadth of his interests and sources earned him critical acclaim across the theological spectrum, including from Orthodox, Pentecostal, and Jewish theologians.
Moltmann was a brilliant thinker and prolific author. During six decades and in 40 books, he further extended the theology of hope, recasting major topics in Christian theology, including the cross and salvation, Trinity, the Holy Spirit, God in creation, as well as theology of joy, passion for life, friendship, and love. Many of his texts are regarded as classics.
Moltmann made a particular contribution to the WCC’s work of Faith and Order on the ancient and unresolved problem between Eastern and Western Christianity about the reference to the Holy Spirit in the Nicene-Constantinopolitan Creed of 381 CE.
Western, unlike Eastern, Christianity has used the Latin term filioque to refer to the Holy Spirit proceeding from the Father and the son. Moltmann favoured the use of the Nicene Creed without the interpolation of the filioque. This has now become the norm in the WCC’s prayer life.