Answer :
Final answer:
Alexander the Great, ruler of the Greeks, defeated the Persians and spread Hellenism throughout the world.
Explanation:
The ruler of the Greeks who defeated the Persians and is responsible for spreading Hellenism throughout the world is Alexander the Great. He ascended the throne of Macedonia after the assassination of his father, Philip II, and went on to build a vast empire by conquering Persian territories. Alexander's military campaigns, known as the Wars of Alexander the Great, resulted in the downfall of the Persian Empire and the spread of Greek culture and influence.
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