Rescheduled: Philosophy picnic. Pre-Socratics. What have they ever done for us?

What have the pre-Socratics done for us? Well, they took the mythology of Homer and Hesiod, shook it upside down and out popped science, logic and mathematics. We will be looking at the major schools, the Milesian, Eleatic and Pythagorean and some of the characters associated with them, Thales, Anaximander and Anaximenes, Parmenides and Zeno, Pythagoras and Philolaus.