Take a distribution involving two or more dimensions—say, apples and oranges. If Smith fares better on one dimension, while Jones fares better on another, how do we compare them? Rawlsians call this the indexing problem: how do we identify the worst‐off group overall? Proponents of the capabilities approach call it the aggregation problem: how do we weight the various dimensions? This essay examines possible solutions, including interpersonal comparisons of utility, the envy test, the egalitarian equivalent approach, undominated diversity, and the solidarity test. Although this essay does not solve the problem, it does identify the crucial question: should we equalize each person's bundle of resources or capabilities, the extent to which each person's bundle fits her preferences, or standing in the community? Since the question is normative—what should we equalize?—philosophers have much to contribute to the debate, and the payoff could be considerable: both policy decisions and other egalitarian debates could hinge on the answer.