The orchestra of a rational universe;
"Each player absorbed in his own instrument only, deaf to the caterwaulings of the others. Then there is a dramatic silence, the conductor enters the stage, raps three times with his baton, and harmony emerges from the chaos. The maestro is Pythagoras of Samos"
- Arthus Koestler
This ancient coloss of a figure may be best know for his theorem on right-angeled triangles, wich actually was known by the Mesopotamians some 1000-1500 years before his time. But his legacy nonetheless is much wider than this triangle theorem. The father of mathematics (as a tool to understading laws of the universe), he was also a pioneer in understading how harmonies in music works. As well as supposedly a groundbreaking caracther in such groups like vegetarians political revolutionarians and "secret knowledge " organizations (ex. Illiuminati, lodges).
Just to get a slight understading of the ripples he created in the history of rational thinking, this is some of the people he came to inspire in the next 2,5k years;
Socrates, Plato, Aristotle, Alexander the Great, Nicholas of Cusa, Andrea Palladino, Leonardo Fibonacci, Leonardo da Vinci, Copernicus, Johannes Kepler, Galileo, William Shakespear, Benjamin Franklin, Isaac Newton, Michael Faraday, Beethoven, Mozart, James Clark Maxwell, Albert Einstein, Richard Feynman, and Stephen Hawking, just to mention a few..
This is the most influential figure in the history of western rational thinking, no doubt about it.