David W. Congdon is a Senior Editor at the University Press of Kansas, where he acquires new titles in political science, and an Instructor at the University of Dubuque Theological Seminary. He is the author of three books, including The Mission of Demythologizing: Rudolf Bultmann's Dialectical Theology (2015, which won the Rudolf Bultmann Prize in Hermeneutics from the Philipps University of Marburg), and the editor of Varieties of Christian Universalism: Exploring Four Views (2023).

'In Who Is a True Christian, David Congdon tells the story of how 20th-century American Christians have repeatedly sought and failed to define and defend a pristine 'orthodox' or 'historic' or 'biblical' Christianity. In contrast to such efforts, Congdon offers his own challenging and inspiring vision of a supple Christianity consciously constructed around an inclusive norm of polydoxy.' Matthew Thiessen, McMaster University

• Introduction: The Rule of Faith in an Age of Anxiety; 1. Modernizing the Rule: The Quest for the Essence of Christianity; 2. Recovering the Rule: The Retrieval of 'Historic Christianity'; 3. Inhabiting the Rule: How Christianity Became a Culture; 4. Weaponizing the Rule: Making Christianity (and America) Great Again; 5. Rewriting the Rule: Christianity without Orthodoxy; Conclusion: The Many Rules of Christianity.

David W. Congdon is a Senior Editor at the University Press of Kansas, where he acquires new titles in political science, and an Instructor at the University of Dubuque Theological Seminary. He is the author of three books, including The Mission of Demythologizing: Rudolf Bultmann's Dialectical Theology (2015, which won the Rudolf Bultmann Prize in Hermeneutics from the Philipps University of Marburg), and the editor of Varieties of Christian Universalism: Exploring Four Views (2023).

'In Who Is a True Christian, David Congdon tells the story of how 20th-century American Christians have repeatedly sought and failed to define and defend a pristine 'orthodox' or 'historic' or 'biblical' Christianity. In contrast to such efforts, Congdon offers his own challenging and inspiring vision of a supple Christianity consciously constructed around an inclusive norm of polydoxy.' Matthew Thiessen, McMaster University

• Introduction: The Rule of Faith in an Age of Anxiety; 1. Modernizing the Rule: The Quest for the Essence of Christianity; 2. Recovering the Rule: The Retrieval of 'Historic Christianity'; 3. Inhabiting the Rule: How Christianity Became a Culture; 4. Weaponizing the Rule: Making Christianity (and America) Great Again; 5. Rewriting the Rule: Christianity without Orthodoxy; Conclusion: The Many Rules of Christianity.