Prioritarianism is the view in normative ethics that increasing people's wellbeing is intrinsically more valuable the worse off these people are.
Broome, John (2015) Equality versus priority: A useful distinction, Economics and Philosophy, vol. 31, pp. 219–228.
Ord, Toby (2015) A new counterexample to prioritarianism, Utilitas, vol. 27, pp. 298–302....