Prioritarianism

Core Idea

Prioritarianism, most associated with Derek Parfit, holds that benefits matter more the worse off the person receiving them is. Unlike strict egalitarianism, it does not value equality for its own sake — it would not endorse leveling down (making everyone worse off to achieve equality). Unlike utilitarianism, it does not treat a unit of benefit to a billionaire as equivalent to the same unit given to someone in poverty. The priority view assigns greater moral weight to improvements in well-being for those at lower absolute levels. This captures the intuition behind Rawls's difference principle while avoiding some of its structural rigidities, though it raises its own difficulties about how steeply to weight benefits to the worst-off.

How It's Best Learned

Compare prioritarianism side by side with utilitarianism and egalitarianism on a distribution problem — e.g., a fixed budget that could give 10 units to a rich person or 8 units to a poor person. Utilitarianism picks the 10; egalitarianism may pick the 8 to reduce the gap; prioritarianism picks the 8 because benefits to the worse-off carry greater moral weight. Then examine Parfit's leveling-down objection to pure egalitarianism.

Common Misconceptions

• Prioritarianism is not maximin (Rawls) — it weights benefits to the worst-off more heavily but does not exclusively focus on the worst-off group.
• It does not ignore benefits to the well-off; it merely discounts them relative to equivalent benefits at lower levels.
• The 'priority' is about absolute position, not relative position — what matters is how badly off someone is, not how much worse off they are than others.

Explainer

Your study of distributive justice has given you the basic toolkit: utilitarian theories maximize aggregate welfare, egalitarian theories prioritize equality, and Rawls's difference principle demands that inequalities benefit the worst-off members of society. Prioritarianism, developed by Derek Parfit, can be understood as a careful attempt to extract the genuine moral insight from each of these views while avoiding their characteristic problems.

Start with a thought experiment. You have a fixed budget of welfare units to distribute. You can give 10 units to a wealthy person or 8 units to someone in poverty. Utilitarianism says: give the 10 units, because more total welfare is better. Strict egalitarianism might say: give the 8, because reducing the gap matters independently of total welfare. But notice the egalitarian claim is strange — it seems to say equality has intrinsic value even if we could make someone better off at no cost. Parfit calls this the leveling-down objection: pure egalitarianism sometimes implies making some people worse off just to achieve equality, which seems perverse. If everyone is equally miserable, that is a strange kind of success.

Prioritarianism resolves this by saying: the 8 units to the poor person are worth *more* morally than the 10 units to the wealthy person, because benefits to people at lower levels of well-being carry greater moral weight. It is not that equality matters intrinsically; it is that the same quantum of welfare improvement has a higher priority when it goes to someone who is badly off. This generates a weighted welfare function: rather than summing raw welfare levels, you sum welfare weighted by a factor that increases as well-being decreases. The poor person's 8 units, once weighted, outweigh the wealthy person's 10.

The key distinctions from adjacent views are worth fixing clearly. Prioritarianism differs from maximin (Rawls's difference principle) because it does not focus exclusively on the worst-off person — it gives extra weight to *all* worse-off people, with the weight increasing as you go lower on the scale. A benefit to the second-poorest matters more than a benefit to the middle, even if the absolute poorest is not affected. It differs from egalitarianism because it has no intrinsic concern with the gap between people — it only cares about absolute levels, not relative positions. And it differs from utilitarianism because it does not treat a unit of welfare as equivalent across all persons. What makes prioritarianism philosophically attractive is precisely this combination: it captures the intuition that improving the lives of the worst-off matters most, without collapsing into the structural rigidities of maximin or the paradoxes of leveling-down egalitarianism. The remaining challenge is determining *how steeply* to weight benefits at lower levels — a question that admits no purely principled answer and forces prioritarianism to confront its own parameter choices.