Up until very recently, the international debate on health inequality tended to disregard the issue of specifying equity objectives precisely. This was unfortunate, given the importance of normative analysis for understanding why people care about social justice in the field of health; the extent to which specific types of inequality are compatible with equity; how the concept should be measured; and how rational policies may be formulated and monitored. This article critically appraises six well established approaches to defining equity—egality, ...