The American evangelical church today faces profound political and cultural challenges. It is vitally important for the church to understand these challenges more fully and to think about them more theologically. It is also important for the church to repent of how we have failed to be the edifying and countercultural influence we ought to be, and craft an approach to public and political life that bears authentic and life-giving witness to who our God is and what he is like. In this book, the author shows how Justin Martyr, a prominent second-century church leader, provides a useful and powerful blueprint by which the church in America can fulfill these God-given tasks more powerfully, more effectively, and more faithfully. In his response to the Roman Imperial culture of his time, in his views of truth, and in his passion for translating the essential truths of the Christian faith for the audiences he faced, Justin Martyr offers a powerful testimony for how we can be faithful witnesses in our own day.