  Abraham ibn Daud (c.1110–1180) can be regarded as a pioneer in Jewish philosophy. His philosophical treatise ha-Emunah ha-Ramah (The Exalted Faith, c. 1160) constitutes the first systematic attempt to integrate Aristotelianism into Jewish thought. However, only a few decades later Moses Maimonides, the medieval Jewish philosopher par excellence, wrote his philosophical magnum opus, Moreh Nevukhim (The Guide of the Perplexed), a work that has much in common with Ibn Daud’s book. As a result, ha-Emunah ha-Ramah was soon superseded. However, traces of its influence are visible in later medieval Jewish thought. This article will survey Ibn Daud’s major ideas and examine his contribution to medieval Jewish philosophy.