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NotesPhilosophy HLTopic 10.6A theory of justice?
Back to Philosophy HL Topics
10.6.49 min read

A theory of justice? (Philosophy HL)

IB Philosophy · Unit 10

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Contents

  1. 1Capabilities against its rivals
  2. 2The 'adaptive preferences' problem
  3. 3Is a fixed list too Western or paternalistic?
  4. 4Paper 2 — the (a) + (b) worked plan
The big idea: Nussbaum doesn't just describe capabilities — she offers them as a better theory of justice than the main rivals.

Two rivals matter most

  • Wealth (GDP) — measures a good society by how rich it is.
  • Utilitarianism — measures it by total or average happiness.
  • Nussbaum argues capabilities beats both.

A theory of justice tells you what a society owes each of its members. Nussbaum's answer: it owes everyone a decent minimum of the ten central capabilities — and that, she argues, gets closer to real justice than either wealth or happiness does.

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Nussbaum's sharpest blow against measuring justice by happiness is one memorable idea.

When people stop wanting what they've been denied: People often shrink their wants to fit what they're allowed. Someone raised to believe girls shouldn't be educated may say she's perfectly content without school — she has adaptive preferences: her wishes adapted to her cage.

Measure by happiness

  • She counts as 'doing fine' — she says she is satisfied
  • The injustice vanishes from the numbers

Measure by capabilities

  • Whatever she's been trained to want, she still lacks the capability to be educated
  • The injustice is exposed
  • That's why Nussbaum measures what people can do, not just how satisfied they feel
Checkpoint — adaptive preferences: In one line: people can be 'happy' simply because they were taught to expect nothing — so justice must measure what they CAN do, not just how satisfied they feel. Hold that — now the strongest objection to Nussbaum herself.

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The most serious challenge turns Nussbaum's own list against her — and she has answers ready.

The objection: Who is Nussbaum, a Western philosopher, to write one list of 'the good human life' for everyone? Isn't that paternalistic — imposing Western values on cultures that see things differently?

Her three replies

1

The list is general

It says 'being able to be healthy', so each culture fills in the details its own way.

2

Capabilities, not functionings

It expands freedom rather than dictating one way to live — no one is forced to use any capability.

3

Built by listening widely

The items came from listening across many cultures to what people everywhere say a decent life needs, so it isn't simply one culture's taste.

General ▸ Freedom ▸ Many voices

Why she still judges: Real justice, she argues, sometimes means criticising a local practice (like denying girls school) — and you can't do that if you refuse on principle to ever judge another culture.
Go further — higher-level insight: The deepest tension is between two goods Nussbaum wants at once: respecting every culture, AND holding a universal standard that lets her call some practices unjust. A pure relativist can't criticise anything; a rigid universalist tramples difference.
Use it in part (b): Her 'general list + capability not functioning' is an attempt to have both. Whether it fully succeeds is exactly the open question a top-band (b) answer weighs — don't just report her replies, judge whether they work.
How Paper 2 works: Prescribed texts are examined on Paper 2 — open-book (you bring a clean copy of Creating Capabilities), 1 hour.

One question on the text, two parts

  • (a) Explain a concept [10] — tests clear understanding.
  • (b) Evaluate a claim [15] — tests whether you can weigh the claim and reach a reasoned judgement.
  • Use your open text to find and quote a short supporting passage.
IB-style questionEvaluate[25 marks]

Evaluate Nussbaum's claim that a just society should be measured by people's capabilities rather than by their wealth or their happiness. [Paper 2, part (b), 15 marks]

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See the mark-by-mark plan — for / against / judgement, with marking guidance — in study mode.

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Common mistakes: 1. Only explaining the claim in a (b) 'evaluate' — you must weigh it. 2. One side only — top marks need both for and against. 3. No judgement — decide, with a reason. 4. Forgetting the open book — quote a short supporting passage. 5. Straying off the text — keep the answer anchored in Creating Capabilities.

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Fill the gap: wanting less because you've been taught to expect less is what Nussbaum calls ______ preferences. [1 mark]

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Previous10.6.3Capability vs functioning, and dignityNextThe "mass man"10.7.1

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