The Franciscan John Duns Scotus (c. 1266-1308) is the philosopher's theologian par excellence: more than any of his contemporaries, he is interested in arguments for their own sake. Making use of the tools of modern philosophy, Richard Cross presents a thorough account of Duns Scotus's arguments on God and the Trinity. Providing extensive commentary on central passages from Scotus, many of which are presented in translation in this book, Cross offers clear expositions of Scotus's sometimes elliptical writing. Cross's account shows that, in addition to being a philosopher of note, Scotus is a creative and original theologian who offers new insights into many old problems.