Theologian Stanley Grenz here tells the story of trinitarian theology in the last century. He analyzes the remarkable ferment in the discipline and discusses key theologians—such as Karl Rahner, Jürgen Moltmann, Wolfhart Pannenberg, Robert Jenson, Elizabeth Johnson, Catherine Mowry LaCugna, Leonardo Boff, John Zizioulas, Hans Urs von Balthasar, and Thomas F. Torrance—on such issues as God's inner life versus God's relationship to creation (immanent and economic trinity), social versus psychological analogies for the relationships within God, the relationship between trinity and Christology, the feminist critique of classical categories, and how God's trinitarian life figures in evolution, social justice, and spirituality. Grenz's introduction places this ferment historically in the course of Christian thought from the medieval period to now, while his conclusion sets a future agenda for the doctrine and theology.