Which prominent greek exercised practical political leadership?

Parmenides

Explanation:

Parmenides was a Greek Philosopher of Elea in southern Italy who founded Eleaticism, which was one of the leading pre-Socratic schools of Greek thought. His generally teachings have been diligently reconstructed from the few fragments of his principal work that survived, which was a three-part verse composition that was titled "ON Nature"

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religion was the center of there society they practiced human sacrifices and which they believed kept there god strong and that he would keep bad guys away hope this