Abstract
This essay charts the parallel growth of Newman's theory of doctrinal development, and infallibility within that doctrinal development, with its author's movement from a via media in Anglicanism to recognition of the truth in the Roman Church. This essay analyzes the theological need for a theory of doctrinal development, the failure of Newman's via media project, and his role as a creative theologian. Then this essay examines in detailed Newman's 1845 Essay on the Development of Christian Doctrine, looking specifically at the second section of the second chapter, ‘On the Probability of a Developing Authority in Christianity.’ The main body of the paper treats the expansion of the scope and feasibility of infallibility in Newman's 1845 Essay.