This paper will examine the relationship between Scottish common-sense philosophy and the formation of New Haven Theology. It will be illustrated that Nathaniel William Taylor's adaptations of orthodox Calvinism (particularly the doctrines of election and predestination and total depravity) relied heavily upon the principles of common-sense philosophy found in the work of Thomas Reid. Furthermore, it will be argued that Taylor's adaptation of Calvinism was a necessary accommodation to the phenomenon of mass conversion and evangelism during the Second Great Awakening.