Answer: Greek states became weaker.
Step-by-step explanation:
For almost 30 years, Sparta and Athens fought on various terrain and locations as they vied for control of the Greek world. In the end the Spartans prevailed and absorbed Athens into its dominion.
The war ravaged the Greek world and every Greek city-state that was involved grew weaker as a result regardless of the winner. This allowed the Greeks to then be conquered by the Macedonians who had avoided the war and so took the opportunity to take over most of Greece.