A Theory of Justice

John Rawls sets out to answer a foundational political question: what principles should govern the basic structure of a society if we want that structure to be genuinely fair to everyone in it, not just convenient for whoever happens to be in power. His method is a thought experiment he calls the original position, in which rational people design a society's rules from behind a veil of ignorance — not knowing their own race, class, talents, gender, or position once the rules take effect. Because no one knows whether they'll end up advantaged or disadvantaged, Rawls argues they would rationally choose principles that protect the worst-off, since anyone could end up in that position. From this reasoning he derives two core principles: equal basic liberties for all, and permitted social and economic inequalities only if they work to the benefit of the least advantaged (the difference principle) and attach to positions open to all under fair equality of opportunity.

The book matters because it offered, at a moment when utilitarianism dominated political philosophy, a rigorous alternative that took individual rights and fairness seriously rather than allowing them to be traded away for aggregate social benefit. Rawls's framework reshaped debates in political philosophy, economics, and law for decades, becoming a reference point for arguments about redistribution, rights, and the proper limits of inequality in a just society.

Who should read it

Students and practitioners of political philosophy, law, economics, or public policy who want the foundational modern argument for liberal egalitarianism, argued with rigorous philosophical method, will find this essential, if demanding.

About the author

John Rawls was an American political philosopher who spent most of his career at Harvard University; A Theory of Justice is widely considered one of the most influential works of moral and political philosophy of the twentieth century.