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THEORY-411: In Sen's capability approach the weighting of functionings is left to public reasoning, and evaluation can still guide action without agreement on weights: where every weighting in an agreed range, or every view by its own argument, ranks one option above another, that ranking holds, so the approach is deliberately incomplete and yields a partial ordering

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Properties6
StatusProposed
Version2
Tagsethics, society-and-governance
SourceLIT-284 — Sen's Capability Approach, LIT-289 — Equality of What?
SupportsCLAIM-354 — Freedom of will and autonomy come in degrees along several dimensions, among them viable reachability, control cost, robustness to disturbance, governance reconfigurability, revisability and motivational integration, and agents compare by inclusion of what they can viably reach under matched conditions: a partial order with incomparable pairs, not a scalar, and a gradient only of a declared measure
CorroboratesCLAIM-352 — Sen's two aspects of freedom divide along the record's line between what an agent can viably reach and the organization that selects among it: viable reachability can stand for the opportunity aspect only through a map from trajectories to valued functionings, which control theory does not supply, and will-organization gives a causal account of part of the process aspect, not of its fairness or legitimacy

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Source

  • Wells, IEP “Sen’s Capability Approach” (2012), LIT-284, read in full in NOTE-257. §3b is the source of the mechanism; §1b(4) and §5b of its rationale.
  • Sen (1979), “Equality of What?”, LIT-289, read first-hand in NOTE-258, for the partial ordering in Sen’s own words (p. 219).

What was actually shown

Two stages (LIT-284, §§3b–3c). Valuation decides which functionings matter and how much. It is “a social choice exercise requiring both public reasoning and democratic procedures of decision-making”, because a philosophically fixed list “denies the relevance of the values people may come to have and the role of democracy” and “the legitimate source of decisions … must be the people concerned” (Sen 2004b, as the IEP reports it). Evaluation then asks what capability people actually have, taking the values as given.

Partial agreement (§3b). Reasonable disagreement makes a complete ranking of functionings unlikely. Action-guiding agreement is still possible by intersection, where different views reach the same judgement by different arguments, and by ranges of weights. The IEP’s example: with weights on literacy relative to health of ½, ⅓, ¼ and ⅕ across four views, all four rank one unit of literacy plus two of health above two of literacy plus one of health. A set of basic capabilities (education, health, nutrition and shelter at minimal levels) can be agreed relatively easily, for assessing poverty.

Incompleteness by design (§§1b, 5b). On the IEP’s reading, the gaps follow from Sen’s concern that evaluation should not “take a short-cut by excluding all sorts of information from consideration in advance”. To the charge of under-theorisation, Sen replies that the approach “is not a theory of justice but rather an approach to the evaluation of effective freedom”.

In Sen’s own text (LIT-289, p. 219). The 1979 lecture already concedes an indexing problem for capability bundles, and answers it with “a partial ordering” from “broad uniformity of personal preferences”, which “must be supplemented by certain established conventions of relative importance”. Weights are “culture-dependent”.

What could have come out otherwise: the admissible weights could have disagreed on every comparison that matters. The example is constructed so that they do not. Whether real disagreements leave enough agreed comparisons is not examined.

What this does not say

  • Which Sen text states the mechanism. The IEP attributes intersection, ranges of weights and basic capabilities to Sen without a citation. Their source is unverified (NOTE-257, open questions). The 1979 partial ordering is the nearest first-hand statement, and it says “conventions”, not public reasoning.
  • That Sen has a selection procedure. The SEP entry (LIT-283) says Sen “has never explained in detail how such a selection could and should be done”, and finds three incompatible readings of “reason to value”. The IEP gives Sen more of a method than the SEP allows.
  • That partial orderings settle hard cases. A range agreed on literacy and health is not a range agreed on liberty and security. How much a partial ordering decides depends on how wide the disagreement is.
  • That the approach is a theory of justice. On Sen’s reply it is an evaluative framework. It names no list and no distributive rule.
  • That Sen is a “comprehensive consequentialist”. The IEP asserts it without citation, and the SEP reports it as contested.

Connections

  • THEORY-025 is the negative half: utility and resource metrics cannot register claims that arise from differences in conversion. This is the structure of what Sen puts in their place.
  • Nussbaum (LIT-288) wants a list of central capabilities with thresholds. On this account a list is what Sen declines, for democratic reasons. The IEP’s §7 sets out how the two differ.
  • Valentini’s defence of categorical principles (THEORY-434) concerns Sen’s method in The Idea of Justice; the partial-ordering idea is what that book’s comparative approach would rest on.

Note of 2026-10-29: what holds it back

The intersection and ranges-of-weights devices the title gives Sen are attributed to him only by the IEP entry (LIT-284), without a citation; the Sen text read (LIT-289) says “conventions of relative importance”, not public reasoning. It waits on a first-hand reading of a Sen text that states the devices, and on the applied case its promote_when names; a narrowing to the IEP’s reading would free neither CLAIM-352 nor CLAIM-354, whose other readings (THEORY-025, THEORY-054) are Proposed.

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