"Miletus, southernmost of the Ionian Twelve [Cities], was in the sixth century [BC] the richest city of the Greek world... Milesian merchants, overflowing with profits, lent money to enterprises far and wide, and to the municipality itself. They were the Medici of the Ionian Renaissance. It was in this stimulating environment that Greece first developed two of its most characteristic gifts to the world — science and philosophy. The crossroads of trade are the meeting place of ideas, the attrition ground of rival customs and beliefs; diversities beget conflict, comparison, thought; superstitions cancel one another, and reason begins. Here in Miletus, as later in Athens, were men from a hundred scattered states; mentally active through competitive commerce, and freed from the bondage of tradition by long absences from their native altars and homes. Milesians themselves traveled to distant cities, and had their eyes opened by the civilizations of Lydia, Babylonia, Phoenicia, and Egypt... Meanwhile wealth had created leisure; an aristocracy of culture was growing up in which freedom of thought was tolerated because only a small minority could read. No powerful priesthood, no ancient and inspired text limited men’s thinking"