Neo-Thomism, the reading of Thomas Aquinas that became the dominant Catholic theological school in the late nineteenth and early twentieth centuries, was eclipsed during the Second Vatican Council but has recently seen a resurgence on the American scene, in terms of both publications and influence among the church hierarchy. This article explores that resurgence in terms of the history of neo-Thomism, the important texts that have come out of this new movement, and signs of its influence on the bishops. In so doing, it critiques the movement for failing to learn the lessons of its fall from favor—in particular, that it has relied on claims to orthodoxy based on authority rather than the power of its own arguments. This article thus argues that theologians should pay careful attention to this movement both to reassert the validity and importance of more contemporary theological methods and to encourage neo-Thomists themselves to develop a greater appreciation of methodological pluralism and reliance on the strength of arguments.