Arthur C. Danto was one of the most influential and prolific philosophers of art of the second half of the twentieth century. More particularly, his encounter with the art of Andy Warhol in 1964 became a crucial moment that would catapult his lifelong attempt to spell out the theoretical conditions of contemporary art, and the implications those conditions held for art history and criticism. In this article, however, I show that Danto was in fact primed for his encounter with Warhol by the newly emerging identity of Anglo-American analytic philosophy at mid-century. Using unpublished archival material, I show that Danto's fundamental insights in his first two major essays in the philosophy of art, “The Artworld” (1964) and “Artworks and Real Things” (1973), were in place at least two years before his chance meeting with Warhol's artwork. In making this more modest historical claim, however, I argue that Danto was part of a broader generation of philosophers who were attempting to work through some of the fundamental problems raised by the naturalist tradition of American thought since the late nineteenth century, problems that became central to the emerging identity of analytic philosophy in its early stages. Among the most pressing of these problems was how values functioned in a naturalistic universe absent theological or metaphysical grounding. Drawing from this philosophical space, Danto's account of art deeply influenced the direction of Anglo-American philosophy of art during the second half of the twentieth century. In the process, he became one of the most significant theorists of contemporary art in the English-speaking world.