McGrath’s Historical Theology: An Introduction (Wiley-Blackwell) is not merely a timeline. It is a genealogical scalpel. He argues that every system—from Augustine’s predestination to Barth’s Christocentrism—is a reaction to a specific historical pressure (Donatism, Nazism, etc.).
McGrath insists that healthy theology requires a constant conversation between all three. His writing demonstrates that the best systematicians (like Aquinas or Calvin) were brilliant historians of doctrine and sharp philosophers. By integrating these fields, McGrath offers a meta-narrative —a grand story of how Christian thought was formed, defended, and passed down. and passed down.