Islamic philosophy is the systematic investigation of problems connected with life, the universe, ethics, society, and so on as conducted in the Muslim world.
Early Islamic philosophy began in the 2nd century AH of the Islamic calendar (early 9th century CE) and lasted until the 6th century AH (late 12th century CE). The period is known as the Islamic Golden Age, and the achievements of this period had a crucial influence on the development of modern philosophy and science; for Renaissance Europe, the influence represented “one of the largest technology transfers in world history.”. This period began with al-Kindi in the 9th century and ended with Averroes (Ibn Rushd) at the end of 12th century. The death of Averroes effectively marked the end of a particular discipline of Islamic philosophy usually called the Peripatetic Arabic School, and philosophical activity declined significantly in Western Islamic countries such as Islamic Spain and North Africa.
Philosophy persisted for much longer in the Eastern countries, in particular Persia and India where several schools of philosophy continued to flourish: Avicennism, Illuminationist philosophy, Mystical philosophy, and Transcendent theosophy. Ibn Khaldun, in his Muqaddimah, made important contributions to the philosophy of history. Interest in Islamic philosophy revived during the Nahda (awakening) movement in the late 19th and early 20th centuries, and continues to the present day.