In this work, Dr. Abdullah Al-Buridi argues that the influential scholar Ibn Taymiyyah should be understood as a systematic philosopher of 'Fitra' (innate human disposition). The book attempts to 'encapsulate' or systematize Ibn Taymiyyah's philosophical ideas, which are scattered throughout his extensive writings. Al-Buridi presents a cohesive framework of his epistemology, ontology, and ethics, challenging the common perception of him as solely a theologian. This study repositions Ibn Taymiyyah as a foundational thinker whose philosophy is grounded in sound, innate reason, making his complex intellectual contributions accessible to contemporary readers.