Reviewed by: John Locke's Christianity by Diego Lucci Benjamin Hill Diego Lucci. John Locke's Christianity. Cambridge: Cambridge University Press, 2020. Pp. 244. Hardback, $99.99. Diego Lucci's John Locke's Christianity is a fabulous work of scholarship—meticulously researched, well argued, and judicious. It should be required reading for everyone interested in John Locke's thought. In the introduction, Lucci aligns himself with John Dunn (The Political Thought of John Locke: An Historical Account of the Argument of the "Two Treaties of Government" [Cambridge: Cambridge University Press, 1969]), John Colman (John Locke's Moral Philosophy [Edinburgh: Edinburgh University Press, 1983]), and Victor Nuovo (John Locke: The Philosopher as Christian Virtuoso [Oxford: Oxford University Press, 2017]), who believe that Locke was a "Christian philosopher" whose "theological concerns, interests, and ideas indeed pervade his philosophical, political, and moral thought" (5, emphasis in the original). John Locke's Christianity, however, is not a book that defends that thesis. It is much more focused and does, basically, just what its title advertises—it provides a systemic and detailed analysis of Locke's core Christian beliefs, and a very excellent one at that. The book is structured around two pillars. The first, consisting of chapters 1–3, involves a contextualized analysis of Locke's theological writings, particularly The Reasonableness of Christianity and Adversaria Theologica. This analysis is then used to reconstruct Locke's conception of the fundamentals of Christianity. The second pillar, consisting of chapters 4–6, then uses this reconstruction to explain puzzling features of Locke's engagements with personal identity, the Trinity, and religious toleration. Lucci's reconstruction of the fundamentals of Locke's Christian beliefs are novel, interesting, and compelling. Furthermore, he uncovers details that materially affect the interpretations of Locke's philosophical accounts of persons and religious toleration, so much so that many popular interpretations begin to look strained after reading Lucci's analysis. Philosophers unaccustomed to considering the theological basis of Locke's account of persons or the Christian significance of religious toleration will now need to engage with Lucci's accounts. Locke famously offered a succinct conception of Christianity: to be a Christian is to believe that Jesus was the Messiah. Lucci shows that this conception, though economical, was by no means thin. At its core was the idea of a moralist soteriology. The promise of eternal life for those who accepted Jesus as the Messiah (and who also strove to follow the law of nature) was vital to morality, in Locke's eyes, because it was only with such an inducement that depraved humans would have firm reason to try to follow the law of nature. In Locke's eyes, Christianity, and only Christianity, offered this inducement to followers of the laws of faith and the laws of nature because of the resurrection of Christ. Lucci's moralist soteriological understanding of Locke's conception of the fundamentals of Christianity differs significantly, for example, from Nuovo's presentation of it ("Locke's Christology as a Key to Understanding His Philosophy," in The Philosophy of John Locke, ed. Peter Anstey [London: Routledge, 2003], 129–53), in which Nuovo identifies Locke's Christology as "the central and organizing principle of his theology" (129). Lucci also provides an excellent answer to one of the enduring questions about Locke's Christianity: was he a Socinian or an Arminian? Against the common view that he is somewhere between the two by being a bit of both, Lucci argues that Locke was in fact neither a Socinian nor an Arminian; Locke rather maintained a unique, irenic position [End Page 331] that may have overlapped somewhat with Socianism and Arminianism but owed nothing to either. Locke's moralist soteriology, along with some of his other Christian beliefs, look like Socinian and Arminian doctrines, admits Lucci. But many of his other beliefs did not, especially, Lucci says, those concerning original sin, satisfaction, and atonement (96–105). This was because Locke's theological beliefs were formed by neither commitment nor opposition to any particular sect, but rather by his careful, plain, and simple reading of the Gospels (50). Locke had no problem with adopting the views of theologians when their positions were revealed through Scripture...