Pythagoras lived from c. 570—c. 495 B.C., and is perhaps most famously known for his theorem (a2+b2=c2). He was originally from Samos but moved to Croton to avoid being ruled by a tyrant. There he set up a school of people dedicated to scholarship. He posited that there are three types of men (he used the example of the Olympics)-those who buy and sell, those who compete, and those who look on, and Pythagoras believed that those who look on are the best type of man. The Pythagoreans spent a lot of time studying numbers, and came to conclude that the world is made from numbers, and that reality was founded and based upon numbers. A famous comparison was made that the body is like a musical instrument. Just as a properly tuned and looked-after instrument produces good music, a properly cared for and healthy body produces the means for a good life. Moreover, our bodies, like instruments, can easily become out of tune, and so we should tune ourselves regularly. Moreover, it was a Pythagorean idea that music is a medicine that can heal the soul. Such was the power of music for Pythagoras. As Pythagoras’ ideas developed, two schools developed, the mathēmatikoi (μαθηματικοί meaning “teachers”) and the akousmatikoi (ἀκουσματικοί, meaning “listeners”). The former emphasised mathematical and scientific development, whereas the latter honed in on the religious aspects. Overall, it seems that Pythagorean thought was dominated by mathematics, and it was maths which the Pythagoreans based their outlook and their ideas about the world. We are indebted to Pythagoras for his work on numbers, as well as his ideas about man-ideas which influenced Socrates and Plato.