What caused the lack of trust betwee Sparta and Athens?

The lack of trust between Sparta and Athens stemmed primarily from their contrasting political systems and cultural values. Athens embraced democracy and naval power, while Sparta was a militaristic oligarchy focused on land-based dominance. Their rivalry intensified during the Peloponnesian War, where both city-states sought to expand their influence, leading to deep-seated suspicion and animosity. Additionally, past conflicts and alliances further fueled their distrust, solidifying the divide between the two prominent Greek city-states.