Veil of Ignorance: Designing a Just Society

simulator intermediate ~10 min
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Maximin — choose the society where the worst-off are best-off

Behind the veil of ignorance, rational agents would choose a society that maximizes the welfare of the worst-off position (maximin principle), since they could end up there. This produces moderate inequality with a strong floor.

Formula

Maximin = max(min(welfare_i)) across all possible social arrangements
Class share_i = total_wealth × weight_i / sum(weights), where weight_i reflects inequality parameter
Expected utility = sum(1/num_classes × welfare_i) for all classes

The Original Position

In A Theory of Justice (1971), John Rawls proposed one of the most influential thought experiments in political philosophy. Imagine you must design the rules of society — but you don't know who you'll be in it. You don't know your wealth, intelligence, gender, race, or even your conception of the good life. From this 'original position' behind the 'veil of ignorance,' what kind of society would you choose?

The Maximin Strategy

Rawls argued that rational agents behind the veil would adopt the maximin principle: choose the social arrangement where the worst-off position is as good as possible. Since you might end up at the bottom, you'd want a robust safety net. The simulation lets you adjust inequality levels and safety nets to see how different configurations affect each class — and what a rational designer would choose.

Inequality Can Be Just

Rawls did not demand perfect equality. His difference principle allows inequality — but only if it improves the position of the least advantaged. A surgeon might earn more than a janitor, but only if that incentive structure produces enough wealth to raise the janitor's standard of living above what it would be under forced equality. The simulation quantifies this trade-off between efficiency and fairness.

A Tool for Modern Policy

The veil of ignorance is more than academic philosophy — it is a practical tool for evaluating policy. Should we fund universal healthcare? Behind the veil, you might be the person who needs it most. Should we have progressive taxation? You don't know if you'll be the billionaire or the minimum-wage worker. The simulation lets you test these decisions with quantified consequences.

FAQ

What is Rawls' veil of ignorance?

John Rawls proposed that to design a fair society, we should imagine choosing its rules from behind a 'veil of ignorance' — not knowing our future position, talents, gender, race, or wealth. This ensures the rules are impartial, since the designer could end up in any position.

What is the difference principle?

Rawls' difference principle states that social and economic inequalities are only justified if they benefit the least advantaged members of society. Any inequality must improve the position of the worst-off compared to perfect equality.

Why would people choose maximin behind the veil?

Since you don't know which position you'll occupy, choosing the society where the worst position is best (maximin) is the rational insurance strategy. You protect yourself against the worst outcome rather than gambling on the best one.

What are the main criticisms of the veil of ignorance?

Critics argue: (1) rational agents might prefer to gamble on high inequality for a chance at great wealth, (2) the veil strips away too much identity to make meaningful choices, (3) it assumes risk-aversion that not everyone shares, and (4) it cannot account for cultural or community values.

Sources

Embed

<iframe src="https://homo-deus.com/lab/philosophy/veil-of-ignorance/embed" width="100%" height="400" frameborder="0"></iframe>
View source on GitHub