Peloponnesian Wars was an ancient Greek war fought by the Athens and Spartans, it took place in the southern peninsula of Greece called Peloponneus.
The Athens lived as a democracy, the people had a say in everything. They were known for their architecture, art, poetry and their feasts and excessive drinking. Solon the reformer from Athens, also brought in the idea of secularism. Which in today's society, I believe is very prominent. The basis is ancient Athens enjoyed their lives.
Spartans was a warrior society, they were very disciplined in their way of living. They were loyal to their government and military, the kings and politicians and the priests had a very prominent role. They were also known for their art and architecture.
One of causes of the Peloponnesian War was the Delian League was to prevent future attack to Greece from Persia. Athens gained lots of wealth because of this alliance which caused lots of animosity between Athens and Sparta.
Sparta declared war on Athens, which commenced the Archidamian War. Spartans invaded Attica, which is the countryside of Athens, this led to a massive plague hitting Athens and killing most of their people.
Along with the Peloponnesian Wars, the Sicily expedition shown itself in 427. At this time Athens and Sparta already concluded their peace treaty in 421, Athenians were allies of Sicily and set out to conquer their island. The first year became successful for the Athens but it ended up with Spartans involving themselves which led to the Athenian's expedition force being destroyed.
The last war of the Peloponnesian Wars was the Decelean War. At this time Spartans had a strong army and Athens had many losses. The Spartans prevented the Athenians from reaching their silver mines, Athens started to fall apart one by one. The repercussions of this war led to Athens being a democracy fall under thirty tyrants for a year.
The aftermath of these wars was many nations gathered up to help Athens, while Sparta became alienated.
The consequences led to the city-states not having trust with each other, so unification became nearly impossible. Many farms were destroyed, and all city-states were weakened.