Al-Kindi emerges as a philosopher who attempted to present, interpret, and supplement past philosophies as parts of an essentially unified tradition that would make for a viable philosophy in Islamic society. He assumes a place at or near the beginning of a philosophical current—based on transmission of studies from late Greek thought—that remained vital in the Islamic world for several centuries. Alfred L. Ivry presents a reevaluation of al-Kindi's relationships with the powerful group of theologians, Muʿtazilah. The commentary defines and interprets terms used by al-Kindi, identifies original Arabic and Greek sources, and analyzes the most recent critical research related to each allusion. Complete bibliography and index of Aristotelian sources.