John Rawls
The 20th century's most important political philosopher who reconstructed liberal justice theory through the veil of ignorance and difference principle
John Rawls (1921-2002) was the most important political philosopher of the 20th century and a Harvard professor. His 1971 'A Theory of Justice' is widely regarded as the most important political philosophy work of the 20th century, ending utilitarianism's dominance in Anglo-American political philosophy. He proposed 'justice as fairness,' whose core tool is the 'veil of ignorance' thought experiment: imagining people choosing basic social institutions without knowing their social position, which yields two principles of justice—the equal liberty principle and the difference principle. The difference principle holds that social inequalities are justified only if they benefit the least advantaged, providing a profound philosophical foundation for the welfare state. His 1993 'Political Liberalism' further restricted justice theory from moral to political philosophy.
Methodologies
- Veil of Ignorance Institutional Design Method - When designing institutional rules, assume you don't know which position you will occupy, thereby designing rules fair to everyone
- Difference Principle Test - When evaluating any unequal arrangement, ask: does this inequality benefit those who are worst off?
Key decisions and timeline
- Born in Baltimore - The longing for justice often springs from personal experience of injustice.
- Participates in WWII, Witnesses Hiroshima Bombing - War experience is the catalyst for many great political philosophies.
- Receives Philosophy PhD from Princeton - Building great theories requires long-term academic accumulation and cannot be rushed.
Beliefs and mental models
- Belief 1 - Whether a society's basic institutional structure is just should be tested through the 'veil of ignorance' thought experiment: if people would still accept an institutional arrangement without knowing their social position, then that arrangement is just. This thought experiment eliminates personal bias and forces people to think about justice from a universal perspective.
- Belief 2 - Socioeconomic inequalities are not inherently just; they can only be accepted when they benefit the least advantaged members of society. This principle opposes pure elitism and requires that any justification of social inequality must demonstrate that it ultimately benefits the most vulnerable groups.
- Belief 3 - In pluralistic societies, political justice cannot rely on any single comprehensive moral doctrine (such as religion or philosophy), but must be built on an 'overlapping consensus' among different moral traditions—common political principles that all parties can accept from their own moral standpoints.
- Model 1
- Model 2
- Model 3