Gregg R. Allison is professor of Christian theology at The Southern Baptist Theological Seminary. He is secretary of the Evangelical Theological Society and a theological advisor for Harbor Network and Upstream Sending. He is author of five major works: Historical Theology: An Introduction to Christian Doctrine (Zondervan, 2011), Sojourners and Strangers: The Doctrine of the Church (Crossway, 2012), Roman Catholic Theology and Practice: An Evangelical Assessment (Crossway, 2014), 50 Core Truths of the Christian Faith: A Guide to Understanding and Teaching Theology (Baker, 2018), and with Andreas Köstenberger, The Holy Spirit (B&H Academic, 2020). He and his wife Nora live in Louisville, Kentucky, where they attend Sojourn Church Carlisle. They have three adult children and 11 grandchildren.