This thesis explores the role of Anselm of Canterbury (1033-1109) in the development of theological thought in the late eleventh and early twelfth centuries. It aims to demonstrate that Anselm’s thought had a greater impact on the early development of scholastic theology than is often recognized, particularly in the areas of the doctrine of the incarnation and redemption, but also in his discussion of freedom and sin. Through his explanation of the economy of salvation in terms of making satisfaction for sin, and his rejection of modes of discussion that focussed on the rights and role of the devil, Anselm’s writing on the theology of the redemption provided a framework for the discussion of later authors such as Hugh of St Victor, Peter Abelard, Bernard of Clairvaux and authors associated with the School of Laon, among others. Such discussion often utilized Anselm as an explicator of difficult passages in patristic theology, notably Augustine, and his work was most controversial when he was thought to have contradicted earlier authority. Anselm was involved in contemporary polemics with both Jews and Christian theologians, as well as producing works that explored profound theological and metaphysical ideas. In his emphasis on the place and role of reason in divine questions, he crossed the boundaries between ‘monastic’ and ‘scholastic’ thought. Through an exploration of Anselmian elements in the thought of a variety of authors from the late eleventh and early twelfth centuries, this thesis aims to contribute to a broadening understanding of the legacy of this great thinker