Abu Bakr al-Razi (865–925 CE)
Abu Bakr al-Razi (865–925 CE) was a prominent figure in the history of medicine in the Islamic tradition and a controversial philosopher. His philosophical ideas, though often reconstructed from reports by hostile sources, include the teaching that the cosmos is produced through the interaction of five "eternal principles": God, Soul, matter, time, and place. His metaphysical doctrine, as far as it can be reconstructed, suggests that God arranges the universe out of pre-existing principles, rather than creating it from nothing. His account of the soul features a mythic origin of the world in which God fashions a physical playground for the soul in response to its desires. Al-Razi's interest in alchemy and his belief in the transmutation of metals is also well-documented. He was a celebrated alchemist, philosopher, and physician, and his contributions to medicine, philosophy, and alchemy have had a significant impact on human civilization, especially in the Islamic world a...