This book provides, for the first time, a philosophical study of the whole range of Boethius's writings (except his textbooks on music and arithmetic): the commentaries and monographs on logic, the Opuscula sacra (short treatises on theology) and the Consolation of Philosophy. It also offers a reassessment of Boethius as a philosopher. Boethius, Marenbon argues, was not merely of importance in transmitting ancient Platonism and Aristotelian logical doctrines of the late ancient Platonic schools to the Latin Middle Ages, but was also a subtle and interesting original thinker. In his Opuscula sacra, he makes innovations in the theological method that would mould medieval thinking. The Consolation both directly tackles problems such as the compatibility of human free will and divine prescience and providence, and through its complex use of the dialog form, probes the relation between philosophy and religious belief, Christian and pagan.