Ancient Greek Philosophy, was never monolithic, that is to say, the diversity of thought represented in the Greek Philosophers is well documented and well chronicled. However, did the Persian religion of Zoroastrianism-(founded around 600 BC/BCE), have any influence on various Ancient Greek Thinkers?
It is not such an implausible question considering the historical fact that Ancient Greek Anatolia-(much of present-day Turkey), was occupied by the Persian Empire for at least 150 years. Some of the earliest Greek Philosophers-(who were more commonly referred to as, "The Pre-Socratic" Thinkers), originally came from Anatolia. Figures, such as Thales, Heraclitus "of Ephesus" and Anaxagoras, were from Anatolia. Even Pythagoras-(who was from the Greco-Aegean island of Samos), lived in very close proximity to the city of Ephesus and the Ionian region- (which, during Pythagoras' time, was under Persian imperial control).
Did the Ancient Greek intellectual concept of Dialectics,as well as the philosophical sayings of Heraclitus extract any type of influence from Zoroastrianism and its Theology of Opposites?