Philosophy

Martha Nussbaum: Human Flourishing and the Capabilities Approach

Dignity, substantive freedom, and what people are actually able to do and be

Martha C. Nussbaum is one of the most influential contemporary philosophers of ethics, political philosophy, human rights, and ancient Greek and Roman thought. Her best-known contribution to political philosophy is the capabilities approach, developed in conversation with economist Amartya Sen and given a distinctive form in Nussbaum’s work. The central question is deceptively simple: when we judge whether a society is just, should we ask how much wealth people possess, how satisfied they say they are, or what they are actually able to do and to become?

Nussbaum’s answer centers on real human opportunities. A person may formally possess rights, income, or legal equality and still lack the practical ability to use them. Poverty, disability, violence, discrimination, poor health, lack of education, or political exclusion can make a nominal freedom almost meaningless. Justice therefore has to be concerned with substantive freedom: the genuine opportunity to live and act in ways compatible with human dignity.

From Resources to Real Freedom

The capabilities approach arose partly from dissatisfaction with measures that treat income, resources, utility, or reported happiness as sufficient indicators of well-being. Equal resources do not necessarily produce equal freedom. A person with a disability may need more resources to achieve mobility. A woman who has income but faces violence or legal restrictions may lack bodily integrity or political agency. A person raised under severe deprivation may lower expectations and report satisfaction with circumstances that still deny important opportunities.

Sen emphasized the difference between resources and capabilities, and Nussbaum developed a more explicitly normative account of the capabilities that a just political order should protect. A capability is an effective opportunity to do or be something. A functioning is the realization of that opportunity. Being literate is a functioning; having a genuine opportunity to become literate is a capability. Political participation is a functioning when exercised; the real ability to participate is the corresponding capability.

The distinction matters because Nussbaum gives freedom a central place. The state should not ordinarily compel a person to exercise every valuable capability. It should secure the opportunity. A person may have the capability to participate in politics and choose not to vote, or have access to education and choose one form of life rather than another. The political aim is to protect a threshold of genuine opportunity while leaving room for pluralism and personal choice.

The Ten Central Capabilities

Nussbaum proposes a list of ten central capabilities that she regards as especially important to a life worthy of human dignity. The list is intended as a political minimum, not as a complete recipe for happiness or a command that everyone live in the same way.

Two points are easily lost when this list is summarized. First, practical reason is not defined by Nussbaum as an ability to identify “good and evil.” Her formulation concerns the ability to form a conception of the good and critically reflect on the planning of one’s life. Second, the list concerns capabilities, not compulsory achievements. Its purpose is to protect a sphere of dignified human possibility.

Aristotle, Vulnerability, and Human Flourishing

Nussbaum’s philosophical background is deeply classical. Her early work on Aristotle and Greek tragedy helped shape a view of human flourishing that takes vulnerability seriously. In The Fragility of Goodness, she examines a recurring problem in ancient ethics: even a person of intelligence and virtue remains exposed to luck, loss, illness, political events, relationships, and circumstances beyond individual control. A good life cannot be understood as complete self-sufficiency.

This helps explain why emotions, affiliation, bodily integrity, and play appear beside reason and political participation in her capabilities list. Human beings are embodied, social, emotional creatures. Love creates vulnerability because what one values can be lost. Friendship and political membership expose a person to dependence on others. Nussbaum treats these facts as central features of human life rather than defects that philosophy should wish away.

The Aristotelian background also explains the language of flourishing often associated with her work. Yet Nussbaum’s political theory does not instruct everyone to pursue a single Aristotelian ideal. Her mature capabilities approach is framed within political liberalism. People may disagree about religion, morality, family, ambition, pleasure, contemplation, and the ultimate meaning of existence while still agreeing that citizens should possess certain basic opportunities.

Dignity, Thresholds, and Justice

Nussbaum’s distinctive contribution is to connect capabilities to human dignity and to argue that each central capability should be secured above a minimum threshold. Justice is therefore not satisfied merely because average wealth rises or because a society produces more total utility. Severe deprivation can remain morally urgent even in a prosperous society.

This makes the approach especially useful in cases where conventional measures conceal unequal freedom. A legal right to vote means little if intimidation prevents its exercise. Formal access to school means little if a child is chronically malnourished. Income alone cannot guarantee safety from domestic violence, mobility for a disabled person, or freedom from social humiliation. The capabilities approach asks whether the surrounding conditions make the nominal right usable in practice.

Nussbaum also insists on treating each person as an end. National prosperity cannot simply be averaged across a population while the interests of minorities, women, disabled people, or other vulnerable groups disappear inside aggregate statistics. The unit of moral concern is the individual person, even though institutions and communities are essential to making individual capabilities possible.

Women, Disability, and the Limits of Traditional Measures

Women and Human Development applies the capabilities approach to entrenched forms of gender inequality. Nussbaum argues that development cannot be adequately measured by national income when women may lack education, bodily safety, legal standing, reproductive choice, or political voice. Her concern is not simply whether resources exist but whether particular people can convert those resources into real freedoms.

Frontiers of Justice broadens the argument by challenging theories of justice that have difficulty dealing with disability, global inequality, and non-human animals. Nussbaum criticizes social-contract approaches when their imagined contracting parties are modeled as roughly equal, independent, productive adults. Human societies include children, elderly people, people with profound disabilities, caregivers, and others whose dependence is not an exceptional condition but part of ordinary human life.

Animals and the Expansion of the Capabilities Idea

Nussbaum extends the language of dignity beyond human beings. In Frontiers of Justice and later in Justice for Animals, she argues that sentient animals should be able to pursue forms of life characteristic of their species. The point is not that every species should live like a human being. Different creatures require different opportunities for movement, social interaction, bodily integrity, sensory activity, and flourishing.

This extension reveals the underlying structure of her approach. Ethical evaluation begins with the kind of creature involved and asks what forms of activity and relationship are central to a life that can go well for that creature. The answer is plural rather than reducible to a single quantity such as pleasure, wealth, or survival.

Criticisms and Open Questions

The capabilities approach is influential partly because it makes difficult questions unavoidable. Who decides which capabilities belong on a universal list? How should a minimum threshold be set? Can a list developed within liberal political philosophy travel across cultures without becoming paternalistic? How should governments balance one capability against another when resources are limited or rights conflict?

Critics have also questioned whether Nussbaum’s list is too individualistic, whether its universality gives insufficient weight to communal traditions, and whether some capabilities are too difficult to measure for policy purposes. Sen has generally resisted fixing one canonical list, preferring public reasoning and context-sensitive selection. Nussbaum defends a more definite list because she believes a theory of basic justice requires enough substantive content to identify serious deprivation.

These disagreements do not make the framework empty. They identify the price of moving beyond simple measures. Income can be counted. Capabilities require judgments about freedom, social conditions, disability, education, safety, political participation, and human diversity. The resulting analysis is less tidy, but it often describes human life more accurately.

Nussbaum and the TOV Question

For TOV, Nussbaum is useful precisely because her philosophy can be connected to the question of a good human life without being turned into a theory she did not propose. She does not tell us that the purpose of life is flourishing. She gives us a disciplined way to ask whether social arrangements enlarge or constrict the real opportunities through which people can pursue lives they have reason to value.

Her first capability, life, shows why survival cannot by itself serve as an adequate account of human good. Continued biological existence is indispensable, but Nussbaum places it beside bodily health, integrity, imagination, emotion, practical reason, affiliation, play, relations with other species, and control over one’s environment. A human life can be preserved while many of these other dimensions are systematically destroyed. Her framework therefore supplies a vocabulary for distinguishing mere continuation from conditions in which human agency can develop.

That distinction also helps clarify discussions of good and evil. Nussbaum does not posit evil as an independent force. Her political philosophy instead identifies concrete forms of deprivation, humiliation, violence, exclusion, and domination that damage capabilities. The language is practical rather than metaphysical: which institutions enlarge dignified human freedom, and which institutions predictably crush it?

Seen this way, the capabilities approach fits TOV’s broader inquiry into the good while remaining faithful to Nussbaum. It does not solve the ancient question of life’s ultimate meaning. It offers something more modest and more usable: a philosophical account of the minimum conditions under which diverse human beings can exercise reason, form attachments, act freely, participate in society, and pursue their own conceptions of a life worth living.

Conclusion

Martha Nussbaum’s capabilities approach shifts attention from what people possess to what they can actually do and be. Its central concepts are dignity, substantive freedom, human diversity, and a threshold of genuine opportunity. The theory is therefore best understood as a contribution to political philosophy and justice rather than as a metaphysical answer to why life exists.

Its philosophical importance lies in the refusal to reduce well-being to a single measure. Wealth, pleasure, survival, formal rights, and reported satisfaction can each reveal something, but none captures the whole of a human life. Nussbaum’s list is an attempt to name the plural conditions that make agency and flourishing possible while preserving room for people to choose very different lives. Whether one accepts every item on the list or every implication of her political liberalism, the question she presses remains difficult to avoid: not merely whether people are alive or formally free, but whether they possess the real capabilities required to live with dignity.

Selected Sources and Further Reading

• Martha C. Nussbaum, The Fragility of Goodness: Luck and Ethics in Greek Tragedy and Philosophy (1986; rev. ed. 2001).
• Martha C. Nussbaum, Women and Human Development: The Capabilities Approach (2000).
• Martha C. Nussbaum, Frontiers of Justice: Disability, Nationality, Species Membership (2006).
• Martha C. Nussbaum, Creating Capabilities: The Human Development Approach (2011).
• Martha C. Nussbaum, Justice for Animals: Our Collective Responsibility (2023).
• Stanford Encyclopedia of Philosophy, “The Capability Approach.”
• University of Chicago, Martha C. Nussbaum faculty profile.