Chapter 11, the first chapter in a part of the book entitled « The Materials of Justice”, presents us with Sen’s well-known theory of capabilities. The main focus of the chapter is to emphasize that the capability approach is essentially a theory about human freedom, or more precisely, a theory about how freedom should be factored into the assessment of advantage and disadvantage. As against welfarist construals, Sen points out that we care not just that we achieve what we want, but also how we achieve what we want. Whether what we achieve results from our own agency, and whether we were able to exercise our agency on a range of valuable “functionings”, matters to an assessment of how well we do just as much, if not more, as does the result of our activity. We should be interested in “comprehensive outcomes”, not just “culmination outcomes”.
Two aspects of the capability approach are emphasized by Sen. First, the theory has an “informational focus”. As opposed to the approach developed by Martha Nussbaum, Sen’s just tells us what we should be concerned with in the measurement of advantage and disadvantage. He does not tell us what we should do with that information once we achieve it. Nor does he fill in the detail about what, precisely, we have reason to care about. The theory is thus neutral, at least on its face, as between different approaches to distributive justice – egalitarian, sufficientarian, prioritarian, and so on, as it is between various ways of filling out the detail of what we have reason to care about.
Second, the theory is pluralistic. There are a range of things that we have reason to value, that cannot be reduced to one metric. Bundles of desirable functionings will reflect this.
Sen deflects two worries about the capability approach. The first comes from welfarists like Arneson and Cohen who argue, on Sen’s way of putting their arguments, that we should be concerned with what people actually achieve, rather than with what they can achieve. Sen’s response to this is that the capability approach includes the welfarist approach because the functionings realized by an individual are part of the set of functionings that he could achieve. Making this broader set the index of his advantage provides us with better information about advantage because it includes freedom to achieve a range of bundles as an ingredient.
The other worry has to do with commensurability. How can we evaluate options given the irreducible pluralism of reasons to value that Sen affirms? Sen responds by stating, in line with much of the recent literature on evaluation, that incommensurability makes evaluation harder, but not impossible.





































































































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