This question is incoherent. If you want an answer rewrite it so that it is clear what you are talking about.
Do you want to take the trouble to reword the question so it makes sense.
Peloponnesian War happened in -431.
Presumably an analyis of the Peloponnesian War. Who did it?
One significant cause of the Peloponnesian War was that some city-states began to fear Athens due to its power grabs and desire for prestige. The war was fought from 431 to 404 BC.
There were many Greek wars - what period did you have in mind? You could always try 'The Causes of the Peloponnesian War'.
History of the Peloponnesian War.
The Peloponnesian war
. . . the Peloponnesian War .
Natural causes, disease, starvation, wounds, other trauma, same then as now.
Aggressivenes of the Athenian empire which interfered in inter-city disputes outside the empire.
Led the Peloponnesian League.
Athens won the first Peloponnesian War but Sparta won the second war