Human salvation has been at the heart of Christian theological debate ever since the earliest centuries of Christianity. In this period, some Christians argued that because all of humanity falls in Adam, the incarnation of Christ, who is the second Adam, must also have a universal effect. Ellen Scully here presents the first historical study of Early Christian theology regarding physicalist soteriology, a logic by which Christ's incarnation has universal effects independent of individual belief or consent. Analyzing the writings of Athanasius, Hilary of Poitiers, Marius Victorinus, Gregory of Nyssa, Cyril of Alexandria, and Maximus the Confessor, she offers an overview of the historical rise and fall of the theological logic of physicalist soteriology. Scully also provides an analysis of how Early Christian theological debates concerning ascetism and ensoulment models have caused Christian narratives of salvation history to become individualistic, and suggests how a contemporary study of physicalist soteriology can help reverse this trend.