Several decades ago David Tracy wrote that theologians speak to three publics: the academy, the church, and society. Since then many theologians have exhibited, in Tracy's words, “that drive to publicness which constitutes all good theological discourse[,] … a drive from and to those three publics.”1 Our four roundtable authors discuss how and why theologians engage the public sphere in the twenty-first century. In arguing for the necessity of such engagement, they also draw attention to the promise and perils of doing public theology today.