History of the Peloponnesian War · Character

Cleon

Athenian demagogue and general whose bluster and aggression made him the loudest voice for war in the assembly.

major

First appearance: Book I

As a major figure in History of the Peloponnesian War, Cleon is not background color—the story leans on what they do once the chapter opens.

Athenian demagogue and general, known for his aggressive stance and role in the Mytilenean debate.

In the storyHistory of the Peloponnesian WarOpen this moment free

Cleon rises from the tanneries to dominate Athenian politics after Pericles' death, trading aristocratic restraint for a politics of fury and flattery aimed at the crowd. He attacks Nicias, pushes for harsh treatment of rebellious allies, and embodies the demagogue Thucydides distrusts—a man whose confidence outruns his competence. His career shows how war and democracy together can elevate the wrong men at the worst moments.

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Character Web

19 connections

A slice of how Cleon sits in the book — open the reader for the full interactive map.

Relationship types

Rivalry
Other

Character groups

Spartan and Athenian Leaders
Diverse Figures of the War
Acarnanian Campaign Commanders

+14 more in the full Character Web

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Narrative arc

Story tension across the book.

Setup
Escalation
Breaking point
Aftermath
Closing

This excerpt marks the dramatic climax because it captures the Athenians' fateful psychological peak of hubris…

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Relationships

Brasidas
rivalry · negative
Brasidas and Cleon were direct military opponents, most famously clashing at the Battle… How this plays out →
Nicias
rivalry · negative

Relationship notes

How these ties play out is in the reading companion — open the free preview.

See Cleon in Book I

In the story

Cleon appears across 8 companion beats. Open any chapter in the free preview to see the notes beside the text.

History of the Peloponnesian War
Athenian demagogue and general, known for his aggressive stance and role in the Mytilenean debate.
Book I
Mentioned briefly as a demagogue in Athens, though his major role comes later.
Book II
Emerges as a prominent demagogue in Athens after Pericles' death.
Book III
Argues for the execution of all Mitylenian men; represents Athenian imperial harshness.
Book IV
Athenian demagogue who takes command at Pylos and secures the surrender of the Spartan forces on Sphacteria.
Chapter XII
The popular leader who persuades the Athenians to reject Spartan peace terms and demand unconditional surrender of the men on the island.
Book V
Mentioned in the context of the peace negotiations and his death at Amphipolis.
The Peace of Nicias and the End of the First War
One of the principal opponents of peace, Cleon's death at Amphipolis removes a major obstacle to negotiations.

Chapter companion notes

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See Cleon in Book I

See Cleon in History of the Peloponnesian War