How did John Rawls use the veil of ignorance to develop principles of justice?

In his seminal work A Theory of Justice, John Rawls revived the social contract tradition to define principles of government that free and rational individuals would choose in a state of perfect equality.12

To ensure impartiality, Rawls introduced the veil of ignorance, a hypothetical condition where individuals are unaware of their personal circumstances—including their race, sex, social class, wealth, talents, and even their own values or goals. By stripping away this information, the veil prevents individuals from acting on self-interested desires to favor their own social groups at the expense of others.312

Situated in this "original position," Rawls argued that rational agents would agree to two fundamental principles of justice:

• Equal Basic Liberties: Each person has an equal right to the most extensive system of basic liberties compatible with similar liberties for all.12
• Regulation of Inequalities: Social and economic inequalities are permissible only if they:
  • Provide the greatest benefit to the least-advantaged members of society (the "difference principle").12
  • Are attached to offices and positions open to all under conditions of fair equality of opportunity.12

These principles serve as the foundation for Rawls's defense of egalitarian liberalism.12