 The capability approach, developed in Sen (1985, 1992), is a particular response to the “equality of what” debate, and is presented by Sen as the best way to think about the relevant interpersonal comparisons to be made for evaluations of social situations at the bar of distributive justice. It is often presented as intermediate between resourcist and welfarist approaches, but it is perhaps accurate to present it as more general. A “functioning” is any doing or being in the life of an individual. A “capability set” is the set of functioning vectors that an individual has access to. This approach has attracted a lot of interest in particular because it makes it possible to take into account all the relevant dimensions of life, in contrast with the resourcist and welfarist approaches which can be criticized as too narrow.