Philosophy
The Capabilities Approach to Human Development in Global Justice
Quick fact
The Human Development Index (HDI), used by the United Nations since 1990, was directly inspired by the capabilities approach—a theory that evaluates well-being by people's real freedoms (capabilities), not just economic output.
Why this is interesting
When we say a country is 'developed,' we usually look at its GDP. But what if the real measure of progress isn't how much money a nation has, but what its people can actually do and be?
Read the full explanation
Understanding The Capabilities Approach to Human Development in Global Justice
Think of two people each with $100. One uses it to afford essential medicine and education; the other lives in a place where health care is unavailable and schools don't exist. Both have the same 'resource,' but they have vastly different opportunities to convert it into a good life. The capabilities approach, pioneered by economist-philosopher Amartya Sen and philosopher Martha Nussbaum, says that justice and development should be judged by what people are actually able to do and to be—their 'capabilities.' Capabilities are the real freedoms to achieve various 'functionings,' such as being well-nourished, educated, or participating in community life. This approach shifts focus from means (income, resources) to ends (real freedoms). It argues that two societies with identical GDPs can be profoundly unequal in human flourishing depending on personal, social, and environmental factors that affect how resources are translated into well-being. So, instead of asking 'How rich is this country?', the capabilities approach asks, 'What can its people really do with their resources?'
A deeper explanation
The capabilities approach works by distinguishing three key ideas: resources, functionings, and capabilities. Resources are the goods and income people have. Functionings are the states of being and doing that a person achieves—such as being healthy, having shelter, or taking part in social life. Capabilities are the genuine opportunities a person has to achieve those functionings; they represent real freedom. The mechanism that makes this approach powerful is its focus on 'conversion factors'—the personal (health, age, gender), social (public policies, cultural norms), and environmental (climate, infrastructure) conditions that determine how well a person can convert resources into functionings. For example, a bicycle (resource) enables a person with usable legs in a safe area to move (functioning), but a person with a disability or living in a war zone cannot. Sen argued that justice should be evaluated through the space of capabilities—not resources, utility (happiness or desire satisfaction), or primary goods (as in Rawls' theory). Utilitarianism fails because happiness adapts to deprivation; people may be content despite severe deprivation. Rawls' primary goods fail because people differ in converting goods into freedoms. By focusing on capabilities, the approach respects diversity and emphasizes agency—people as active participants in their own development. Nussbaum extended the theory by proposing a list of ten central capabilities (such as life, bodily health, and practical reason) that should be guaranteed for a just society. While Sen deliberately refused to endorse a fixed list, both emphasize that the ultimate goal of development is to expand people's freedoms, not merely to raise income. This has transformed global justice debates, influencing policy frameworks like the Human Development Index and shaping discussions on gender equality, disability rights, and poverty reduction.