Historians argue that The Peloponnesian Wars were like so many wars, before and since, all about empire. In the end they all fall, but at horrendous cost to human life.
The Peloponnesian War (431–404 BC) was an ancient Greek war fought by the Delian League led by Athens against the Peloponnesian League led by Sparta. It might seem unlikely, but in that setting the cradle of democracy emerged.
Athens is often regarded as the birthplace of democracy and remains an important reference-point for democracy. Literature about the Athenian democracy spans over centuries with the earliest works being The Republic of Plato and Politics of Aristotle, continuing with Discourses of Niccolò Machiavelli.
Democracy is not the be all and end all, Hitler came to power by using the vote, but it's the best option that we have. Even so, it can still be divisive and some would argue, open to contrived manipulation.