Social Identity Theory (SIT) is a promising tool in New Testament studies for helping readers understand the dynamics and formation of group identity in the First Century. The specific contention of this dissertation is that the author of Luke-Acts seeks to create and shape identity among God-fearers in the New Christian Movement by means of “cultural memory” and prescribed group behavior. Luke has an inclusive agenda that involves decentralization of the Jewish establishment, while redefining a number of core symbols of Judaism (notably the Temple and the land) around Jesus. Luke’s robust sense of gospel - rooted in Israel’s history, while extending to all people – forms a crucial backdrop for investigating his ethnically universalist tendencies and his narrative methods of communication. Specifically, social identity is formed through the use of prototypes and exemplars, characters that resemble a quality that the group either desires to promote or eliminate. Luke communicates many of these facets through speeches, utilizing elements of firstcentury Greco-Roman rhetoric. My eclectic, yet integrated approach aims to do justice to under-recognized features of social identity formation in Luke’s two volume work, with a particular focus on volume two (Acts).