And part of this belief was that everything from cosmology and metaphysics to music and morals followed eternal rules describable as ratios of numbers.
Their dictum of "all is number" suggested that numbers were the building blocks of the universe.
Like many heros of Greek myths, the philosopher Hippasus was rumored to have been mortally punished by the gods. But what was his crime? Did he murder guests or disrupt a sacred ritual?
Hippasus belonged to a group called the Pythagorean mathematicians who had a religious reverence for numbers.
Hippasus's transgression was a mathematical proof: the discovery of irrational numbers