 Avicenna wrote in different genres, but his major innovation was the development of the summa philosophiae, a comprehensive work that included all parts of philosophy as classified in the late antique Alexandrian and early Islamic tradition (cited above). This was due as much to his own philosophical training, which followed this curriculum, as to the earliest commissions he received while still in Bukhara for works that would encompass all philosophy; but then these commissions inevitably reflect the broad philosophical culture of the period that viewed science and philosophy as an integral whole. Already in his very first philosophical treatise, Compendium on the Soul, which Avicenna dedicated to the Samanid ruler, as noted above, he presented the theoretical knowledge (the intelligible forms) to be acquired by the rational soul precisely as classified in the philosophical curriculum (Gutas 2014a, 6–8), and with his second work, the Philosophy commissioned by ʿArūḍī, he fleshed out this outline into the first scholastic philosophical compendium or summa. He went on to write seven more such summae in his career, ranging in length from a sixty-page booklet (Elements of Philosophy, ʿUyūn al-ḥikma, GS 3), written earlier in his career, to the monumental The Cure (al-Shifāʾ), in his middle period. It runs to twenty-two large volumes in the Cairo edition (1952–83), and its contents exhibit all the parts of philosophy in the Aristotelian tradition which they reproduce, revise, adjust, expand, and re-present, as follows: