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The Nudge Characters

A cafeteria tray, a rigged wheel, and the quiet architecture of every choice you make.

Who drives the story

Main characters

Carolyn

Director of food services for a city school system, quietly experimenting with cafeteria lines. Her rearrangements—fruit at eye level, desserts out of easy reach—swing consumption by up to 25 percent and hand the authors their founding insight.

Appears in:
Part 1: The Cafeteria and the Rigged Wheel
Themes:
There is no neutral design
Transparency as a nudge

The Planner

Your Reflective System, the long-term self who budgets, diets, and promises. It drafts the resolutions that the Doer will break by Tuesday.

Appears in:
Part 2: Planners, Doers, and the Herd
Themes:
Humans are not Econs

The Doer

Your Automatic System, hungry, instant, and holding the fork. It wins most battles because it shows up first and never gets tired.

Appears in:
Part 2: Planners, Doers, and the Herd
Themes:
Humans are not Econs

Linda

A philosophy major, outspoken and concerned with social justice, used as a thought experiment. People judge 'bank teller and active in the feminist movement' more likely than 'bank teller'—a logical impossibility that exposes how our minds stereotype.

Appears in:
Part 1: The Cafeteria and the Rigged Wheel

Thaler and Shlomo Benartzi

The designers of Save More Tomorrow, the program that lets future raises fund future savings. Their trick turns the Doer's laziness into the Planner's victory.

Appears in:
Part 3: Money, Health, and the Defaults That Decide

How they are connected

Key relationships

Go deeper

The Nudge themes & symbols

There is no neutral design · Humans are not Econs · Freedom within gentle steering · The power of the herd and the spotlight

Themes explained

Read the full the nudge summary

The full story act by act, the ending explained and a quick quiz.

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