What effect did the conflict between Athens and Sparta have in ancient Greek civilization?

The conflict between Athens and Sparta, primarily exemplified by the Peloponnesian War (431-404 BCE), significantly impacted ancient Greek civilization by leading to the decline of Athenian power and the eventual weakening of the Greek city-states. It fostered political instability, economic hardship, and social strife across the region. The war also highlighted the differences between the democratic ideals of Athens and the militaristic oligarchy of Sparta, ultimately setting the stage for the rise of Macedonian dominance under Philip II and Alexander the great. Furthermore, the conflict contributed to shifts in cultural and philosophical thought, as cities grAppled with the consequences of war and governance.