The Peloponnesian war destroys the Greek balance

Twenty-seven years of war between Athens and Sparta exhausted the classical Greek world; Thucydides chronicled it as a study of power, fear and miscalculation.

Why it matters

Thucydides' history — plague, civil strife, the Sicilian disaster — remains the founding analysis of how great-power fear and overreach end in ruin.

Related events

• c. 431 BCE – 400 BCE

  Thucydides writes power's anatomy

  Thucydides treated the war not as divine drama but as human causation: fear, honor and interest, examined with political-science rigor.

  Knowledge · europe

• 447 BCE – 432 BCE

  The Parthenon rises over Athens

  Under Pericles, Athens rebuilt its acropolis in marble after the Persian wars; the Parthenon became the emblem of the city's democracy and empire.

  Art · europe

• 470 BCE – 399 BCE

  Socrates questions Athens

  Socrates wrote nothing; he walked and talked, pressing Athenians to define justice, courage and the good — and died for refusing to stop.

  Philosophy · europe

Sources

• Encyclopædia Britannica — Peloponnesian War