Avicennism in the context of "Illuminationist philosophy"

Early Islamic philosophy or classical Islamic philosophy is a period of intense philosophical development beginning in the 2nd century AH of the Islamic calendar (early 9th century CE) and lasting 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 in the development of modern philosophy and science. For Renaissance Europe, "Muslim maritime, agricultural, and technological innovations, as well as much East Asian technology via the Muslim world, made their way to western Europe in one of the largest technology transfers in world history." This period starts with al-Kindi in the 9th century and ends with Averroes (Ibn Rushd) at the end of 12th century. The death of Averroes effectively marks the end of a particular discipline of Islamic philosophy usually called the Peripatetic Arabic School, and philosophical activity declined significantly in Western Islamic countries, namely in Islamic Spain and North Africa, though it 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.

Intellectual innovations, achievements, and advancements of this period included, within jurisprudence, the development of ijtihad, a method or methodological approach to legal reasoning, interpretation, and argument based on independent inquiry and analogical deduction; within science and the philosophy of science, the development of empirical research methods emphasizing controlled experimentation, observational evidence, and reproducibility, as well as early formulations of empiricist epistemologies; commentaries and developments in Aristotelian logic, as well as innovations in non-Aristotelian temporal modal logic and inductive logic; and developments in research practice and methodology, including, within medicine, the first documented peer review process and within jurisprudence and theology, a strict science of citation, the isnad or "backing".

Muslim philosophers both profess Islam and engage in a style of philosophy situated within the structure of the Arabic language and Islam, though not necessarily concerned with religious issues. The sayings of the companions of Muhammad contained little philosophical discussion. In the eighth century, extensive contact with the Byzantine Empire led to a drive to translate philosophical works of Ancient Greek Philosophy (especially the texts of Aristotle) into Arabic.

The ninth-century Al-Kindi is considered the founder of Islamic peripatetic philosophy (800 CE – 1200 CE). The tenth-century philosopher al-Farabi contributed significantly to the introduction of Greek and Roman philosophical works into Muslim philosophical discourse and established many of the themes that would occupy Islamic philosophy for the next centuries; in his broad-ranging work, his work on logic stands out particularly. In the eleventh century, Ibn Sina, one of the greatest Muslim philosophers ever, developed his own unique school of philosophy known as Avicennism which had strong Aristotelian and Neoplatonist roots. Al-Ghazali, a famous Muslim philosopher and theologian, took the approach to resolving apparent contradictions between reason and revelation. He understood the importance of philosophy and developed a complex response that rejected and condemned some of its teachings, while it also allowed him to accept and apply others. It was al-Ghazali's acceptance of demonstration (apodeixis) that led to a much more refined and precise discourse on epistemology and a flowering of Aristotelian logic and metaphysics in Muslim theological circles. Averroes, the last notable Muslim peripatetic philosopher, defended the use of Aristotelian philosophy against this charge; his extensive works include noteworthy commentaries on Aristotle. In the twelfth century, the philosophy of illumination was founded by Shahab al-Din Suhrawardi. Although philosophy in its traditional Aristotelian form fell out of favor in much of the Arab world after the twelfth century, forms of mystical philosophy became more prominent.