In this work, Gamble offers an essential contribution to understanding the morphology of American civil religion by tracing the reception history of John Winthrop's "Model of Christian Charity" according to his hearkening to Christ's call to the church to be a "a city set on a hill" (Matt. 5:14). He reveals that this metaphor, though given a broader application to the collective whole of Winthrop's envisioned Puritan commonwealth rather than the church alone in his own exegesis, was not notable to either historians or American public figures until the scholarship of Perry Miller and the rhetoric of John F. Kennedy of the twentieth century infused it with greater civic significance. However, it was Ronald Reagan who appropriated it for maximal impact as far as it concerned his recounting of the origin story of American exceptionalism, giving rise to its retroactive preeminence today. As a result, Gamble contends both for conceiving of Winthrop and the Puritan errand in America on its own terms as well as reclaiming the metaphor for the church it originally belonged to. This study is superb in showcasing history's true purpose in scholarship: rightly interpreting the past instead of redefining it for our own purposes in the present. Thus, it is equal parts a call to sounder historiography for Americans regarding our political and cultural identity and a more faithful hermeneutic for Christians concerning our own respectively in the twenty-first century.