Was the Peloponnesian War a failure of diplomacy, ideology, or realpolitik?

Sources (assume everything is a direct quote): Peloponnesian War - Wikipedia DIPLOMACY Definition & Meaning - Merriam-Webster IDEOLOGY Definition & Meaning - Merriam-Webster Realpolitik - Wikipedia Peloponnesian War Total War between Athens (Delian League) and Sparta (Peloponnesian League), with later support from the Persian Empire Goal: hegemony over Ancient Greece Results: Sparta victory…