How did the war between Athens and Sparta affect greek government?

Volumes could and have been written about this issue. I will only mention one thing, Athens was the cradle of democracy while Sparta was known for its strict military rule. Democracy spread from Greece to other countries but it took the whole of the middle ages to pass before the ancient ideas were actually implemented in full, although the establishment of parliament for example in England can be traced back to Greece in ancient times. Read all about this in history books of ancient Greece.