Jürgen Moltmann is a German theologian known for his influential work in the field of Christian theology. Born in 1926, he served in the German military during World War II and later experienced profound changes in his beliefs while in a prisoner-of-war camp. His most notable work, Theology of Hope, emphasizes the importance of hope in Christian faith and the role of the future in shaping present actions. Moltmann's theology is often associated with Liberation Theology and Ecological Theology, as he advocates for social justice and environmental responsibility. He argues that God's presence is found in human suffering and that faith should inspire action towards a better world. His ideas have significantly impacted contemporary theological discussions.