Critical legal studies (CLS) is the movement that took legal realism’s skepticism about rules and turned it into a political analysis of law itself. Where the realists said legal rules don’t determine outcomes, CLS asked: whose interests does this indeterminacy serve?
The movement emerged in the late 1970s at Harvard, Wisconsin, and a few other law schools, drawing on realism, Marxism, Frankfurt School critical theory, and structuralism. The founding Conference on Critical Legal Studies (1977) brought together scholars who shared the conviction that mainstream legal thought — both the liberal rights tradition and the conservative law-and-economics movement — concealed law’s role in maintaining existing power relations.
The core CLS argument is the indeterminacy thesis: for any legal rule, equally legitimate legal arguments can be constructed on both sides of a dispute. Legal reasoning doesn’t compel a particular outcome; it provides a vocabulary for justifying whatever outcome the decision-maker prefers. The appearance of logical necessity in legal argument is ideology — it makes political choices look like the inevitable products of neutral principles.
Duncan Kennedy’s work on legal education argued that law school doesn’t just teach rules — it socializes students into a professional ideology that treats existing social arrangements as natural and legal reasoning as apolitical. Roberto Mangabeira Unger’s The Critical Legal Studies Movement (1986) argued for “deviationist doctrine” — legal argument that works within the system’s own materials to destabilize its claims to coherence and necessity.
CLS also developed “trashing” — the detailed demonstration that a legal doctrine, when examined closely, contradicts itself, rests on unstated assumptions, or can be turned to support the opposite of what it purports to support. The goal was not to replace bad doctrine with good doctrine but to show that doctrine itself is a form of political argument disguised as neutral reasoning.
Critiques and limitations
CLS was attacked from all sides. From the right, it was dismissed as nihilism — if all legal reasoning is political, then there’s no basis for any legal argument, including the arguments CLS scholars wanted to make for social justice. From the liberal center, the charge was irresponsibility: CLS scholars were better at demolishing existing frameworks than building alternatives.
The most consequential critique came from within the left. Critical race theorists — Derrick Bell, Kimberlé Crenshaw, Richard Delgado — argued that CLS’s analysis of rights as indeterminate ignored the lived experience of communities for whom rights claims were a matter of survival, not academic exercise. The critique wasn’t that CLS was wrong about indeterminacy but that its analysis was incomplete: it didn’t account for how race structures legal power in ways that class analysis alone can’t capture.
Feminist legal theorists made a parallel critique: CLS treated law as abstract power while ignoring the gendered dimensions of legal personhood, property, contract, and family law.
These internal critiques generated critical race theory and feminist legal theory as distinct movements — not rejections of CLS but extensions of its analysis into domains it had neglected.
Key texts
- Roberto Mangabeira Unger, The Critical Legal Studies Movement (1986)
- Duncan Kennedy, Legal Education and the Reproduction of Hierarchy (1983)
- Mark Tushnet, “An Essay on Rights” (1984)
- Morton Horwitz, The Transformation of American Law (1977)
See also
- Legal Realism — the tradition CLS radicalized
- Feminist Legal Theory — the movement that extended CLS’s critique to gender
- Hegemony — the broader concept of domination through consent that CLS applies to law
- Ideology — the mechanism by which law presents political choices as neutral necessity