Whether they know it or not, Christians living today are the beneficiaries of two millennia of careful reflection on God, humanity, salvation, and the world. Making the riches of church history accessible to modern readers, professor Michael Reeves highlights some of the key theologians every Christian should know. Written as an introduction for those unfamiliar with historical theology, this accessible primer will convince readers, perhaps for the first time, that the lives and thought of these influential men--the Apostolic Fathers, Irenaeus, Athanasius, Augustine, Anselm, Aquinas, Luther, Calvin, Owen, Edwards, Schleiermacher, Barth, and Packer--still matter today. Indeed, such figures have much to teach us when it comes to the nature of saving faith, the beauty of God's glory, the healthy functioning of the church, humanity's glorious future, and so much more.