How did the Persian Wars affect the Greek people especially the Athenian?

After the Persians agreed to peace, Athens converted the Delian League, which it had led against the Persian Empire, into an empire of its own, continuing to collect the war funds by force and using them for its own benefit, with lavish buildings, arts and putting half its people on the public payroll.

It became overconfident, interfered in the affairs of other cities and brought on the devastating Peloponnesian War, which it lost and was stripped of its empire, becoming a second rate power.