How did John Rawls’s veil of ignorance aim to prevent unfair principles of justice?

In his seminal work, A Theory of Justice, the philosopher John Rawls introduced the "veil of ignorance" as a conceptual tool to ensure fairness in the selection of political and social principles.

Rawls argued that to establish a truly just society, one must adopt a hypothetical "original position" of perfect equality. By placing individuals behind a "veil of ignorance," he stripped them of knowledge regarding their own social, economic, and historical circumstances—such as their race, sex, class, wealth, intelligence, or personal goals.

This mechanism prevents individuals from advocating for principles that would unfairly benefit their own specific social group or personal interests at the expense of others. Because no one knows their own position in society, they are compelled by reason and self-interest to agree to principles that protect the rights and welfare of all members, including the least advantaged. This approach serves as a vital ethical safeguard, ensuring that justice is not merely a reflection of the preferences of a dominant majority, but a fair framework that respects the inherent rights of every individual.123