Most scholars of Reformed orthodoxy devote little attention to the nineteenth century, and most students of nineteenth century Reformed thought bypass the influence of Reformed orthodox ideas on their subjects. Aligning himself with Reformed theology in nineteenth century America, Charles Hodge’s writings are an ideal place to bring such studies together. Hodge’s American context and Reformed identity illustrate the persistence and change of Reformed ideas in a post-Enlightenment context. Encompassing philosophy, science, and theology, Ryan M. McGraw traces the development of Hodge’s ideas with an eye both to Reformed orthodoxy and to American thought.