Although his importance has long been known to Ockham specialists, complete critical editions of his work have only recently become available, and detailed scholarly analysis of his views, influence, and intellectual life are in a nascent stage. Consequently, this article will not summarize his positions under broad, modern headings such as ‘metaphysics’, ‘epistemology’, etc., but will rather present exposition and analysis of his contributions to several narrower problems which remain philosophically viable today.