Dialogues · Character

Glaucon

Plato's brother, restless and ambitious, who demands that Socrates prove justice is good for its own sake and not merely for its rewards.

supporting

First appearance: book i

As a supporting figure in Dialogues, Glaucon is not background color—the story leans on what they do once the chapter opens.

Challenges Socrates on the nature of justice in the Republic.

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Glaucon is the young Athenian who refuses to be satisfied with easy praise of justice and instead revives Thrasymachus' hardest challenge in his own voice. He wants to hear justice honored for itself, stripped of…

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See Glaucon in book i

Character Web

40 connections

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Relationship types

Other

Character groups

Philosophers and Interlocutors
Parmenides Narrators
Extended Cast of Dialogues
Fathers Seeking Education

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Narrative arc

Story tension across the book — this chapter sits in Exposition.

Setup
Escalation
Breaking point

In this excerpt, the dramatic climax occurs when Erasistratus’s boastful praise of the Syracusan envoy’s immen…

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In the story

Glaucon appears across 12 companion beats. Open any chapter in the free preview to see the notes beside the text.

Dialogues
Challenges Socrates on the nature of justice in the Republic.
Republic
Challenges Socrates to defend justice for its own sake.
Introduction and Analysis
Socrates' interlocutor, who is urged to follow the argument and is addressed directly in the search for justice.
The Republic
Socrates' interlocutor; responds to Socrates' arguments about justice and the philosopher's role.
Book II
Challenges Socrates to defend justice intrinsically, excluding reputations and rewards.
Book III
Responds to Socrates, agreeing on the principles of education and the need to control tales about death.
Book IV
Engages actively with Socrates, agreeing that the question of justice vs. injustice is now ridiculous, and follows the argument about the forms of vice and virtue.
Book V
Challenges Socrates to explain the community of women and children; agrees with the resolution to press Socrates for an answer.
Book VII
Socrates' primary interlocutor, questioning and responding to the proposals for the philosopher-kings.
Book VIII
Socrates' interlocutor; responds to and questions Socrates' analysis of political change.
Book IX: The Tyrannical Soul and the Superiority of Justice
Responds to Socrates' questions, agreeing with the parallels between the tyrannical state and the tyrannical soul, and affirming the conclusions about pleasure and justice.
Book X
Socrates' primary interlocutor; expresses astonishment at the claim of the soul's immortality and engages in the subsequent arguments.

Chapter companion notes

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See Glaucon in book i

See Glaucon in Dialogues