John Rawls and the Veil of Ignorance

A thought experiment for designing fair economic rules without knowing your own place in society.

Philosopher John Rawls proposed one of the most influential modern tools for thinking about economic fairness: a thought experiment designed to strip away self-interest when deciding what a just society should look like. Rather than asking “what rules benefit me,” Rawls asked what rules people would choose if they didn’t yet know who they would be.

The original position and the veil of ignorance

Rawls imagined a group of people gathered to design the basic rules of their society - its laws, its economic system, its distribution of rights - before that society exists. He called this hypothetical starting point the original position. The key twist is what he called the veil of ignorance: behind this veil, none of the designers knows their own future race, sex, talents, wealth, health, or social class. They know general facts about how societies and economies work, but nothing about where they personally will land within the system they are designing.

Rawls argued that people reasoning this way would design fairer rules than people who already knew their own advantages, because no one could tilt the rules in their own favor without risking that the disadvantaged position might turn out to be theirs. A wealthy designer who secretly hoped to stay wealthy would have to plan as if they might instead be born into poverty.

Cutting the cake without knowing your slice

A simple version of this idea appears in a common trick for dividing a cake fairly among children: let one child cut the cake, but let another child choose which slice to take first. Because the cutter does not know which piece they will end up with, they have a strong incentive to cut the pieces as evenly as possible. The veil of ignorance applies that same logic to an entire society's economic rules, not just a cake.

The difference principle

From behind the veil, Rawls argued, rational people would not simply choose strict equality, since some inequality can make everyone better off - for instance, if paying higher wages for particularly demanding or highly skilled work leads to more of that work being available, benefiting society broadly. Instead, Rawls proposed what he called the difference principle: economic inequalities are justified only if they work to the benefit of the least advantaged members of society. Under this principle, a policy that made the wealthy dramatically richer while leaving the poorest completely unaffected, or making them worse off, would not be justified, even if it grew the economy overall.

Primary goods

Rawls also introduced the idea of primary goods - the basic things any rational person would want regardless of their specific life plans, such as rights and liberties, opportunities, income and wealth, and the social bases of self-respect. Justice, for Rawls, meant designing a society that distributes these primary goods fairly, prioritizing the position of the worst-off before considering how much better off everyone else becomes.

Assuming the veil of ignorance demands strict equality

A frequent misreading of Rawls is assuming his thought experiment leads directly to insisting on equal outcomes for everyone. It does not. Rawls explicitly allowed for unequal outcomes, as long as those inequalities genuinely improved the position of the least advantaged group compared to a more equal alternative. His framework is a test for which inequalities are justified, not a blanket argument against inequality itself.

Criticisms and continuing influence

Critics have raised real objections to Rawls’s approach. Some argue that people behind a veil of ignorance might reasonably take on more risk than Rawls assumed, rather than focusing entirely on protecting the worst-off position. Others argue that the thought experiment, by stripping away all personal information, also strips away morally relevant facts, such as how hard someone actually worked. Even so, the veil of ignorance remains one of the most widely taught tools in economic ethics, because it offers a concrete way to test policies for self-interested bias.

Key takeaways

The veil of ignorance asks designers of a society's rules to reason without knowing their own future position within it.
This is meant to remove self-interested bias from decisions about fairness.
The difference principle holds that inequalities are just only if they benefit the least advantaged.
Rawls's framework does not require strict equality - it permits inequality that genuinely helps the worst-off.
Critics question both the risk assumptions behind the veil and whether it strips away morally relevant facts.