Did Socrates, Plato, and Aristotle truly influence modern day society?

There is always the question of whether or not Socrates actually existed or was a created being for the purpose of Plato's philosophy. Plato is a basic source for much of the philosophy of Christianity in the Western World. Aristotle outlined a lot of the ethics that are in use in the Western World, but most of that is unversal - the Golden Rule which appears in the New Testament is very close to Aristotle's concept and the Chinese philosopher Cofucious said the same thing at about the same time.