20th Century

• The shift of Christianity to the “Global South” (twentieth century) (1900–2000)
• Catholic modernism and its condemnation by Pius X (1902–1914)
• Karl Rahner and "anonymous Christianity" (1904–1984)
• Dietrich Bonhoeffer: "cheap grace" and martyrdom (1906 – 9 April 1945)
• The 1910 Edinburgh Missionary Conference and the birth of the ecumenical movement (1910–1937)
• From fundamentalism to American neo-evangelicalism: "The Fundamentals," Carl Henry, Billy Graham (1910–1976)
• The Niebuhr brothers and American Christian realism (1913–1944)
• Paul Tillich and the "method of correlation" (1914–1965)
• The age of ideologies: Toynbee, the First World War and totalitarianism (1914–1989) (1914–1989)
• Pierre Teilhard de Chardin: evolution and the Omega Point (1916–1955)
• The Russian Orthodox Church under Soviet rule (1917–1964)
• Karl Barth and neo-orthodoxy (1919–1968)
• Rudolf Bultmann and the program of demythologization (1921–1961)
• The papacy and fascist regimes: from the Lateran Accords to the end of Pius XII's pontificate (1922–1958)
• The founding of the World Council of Churches and its assemblies (1925–1991)
• Jürgen Moltmann and the theology of hope (1926–1990)
• Wolfhart Pannenberg: revelation as history (1928–1988)
• Hans Küng – the "rebellious Catholic" (1928–1990)
• The East African Revival (balokole): Nsibambi, Church, Nagenda, Kivengere (from 1929)
• The "German Christians," the Barmen Declaration, and the Confessing Church (1933–1934)
• Nazism, the Holocaust and Christians in the Third Reich (1933–1945) (1933–1945)
• The discovery of the Nag Hammadi library (1945)
• Christianity in China under the Communists: persecution, “registered” and underground churches, Cardinal Gong Pinmei (1949–1982)
• The renewal of Catholic theology and the Second Vatican Council (1950–1978)
• The Civil Rights Movement and the rise of black theology (1954–1986)
• Latin American liberation theology: Medellín, Gutiérrez, Puebla (1960–1986)
• "Death of God" theology and radical secular theology of the 1960s (1961–1969)
• The rise of feminist theology (1963–1987)
• American Apocalyptic Culture: Hal Lindsey, “Left Behind” and Harold Camping’s Failed Prediction (1972–2011) (1972–2011)
• The Lausanne Movement for World Evangelization (1974–1989)
• Radical Orthodoxy: the Cambridge theological movement (from 1992) (from 1992)
• ‘Reformed catholicity’: retrieval of the catholic tradition in contemporary Reformed theology (from 2003)