A Short History of Class Action Lawsuits in the US

By Timo Bakker · July 6, 2026 · 6 min read

Class actions in their modern form did not exist before 1966. Here is the compressed history of how they became one of the primary consumer protection tools in the US.

Pre-1966: representative actions

Common-law "representative suits" existed for centuries but had narrow application — usually property disputes among identifiable parties. They were slow, expensive, and rarely used.

1966: Rule 23 amendment

The Advisory Committee on Rules of Civil Procedure rewrote Federal Rule 23 to allow modern class actions. Key innovation: the "(b)(3)" category allowing damages classes where common questions predominated over individual ones. This unlocked consumer protection litigation at scale.

1970s-1980s: growth

Antitrust, securities, and civil rights class actions expanded rapidly. Consumer product cases started appearing (asbestos in the 1970s, cigarettes in the 1980s).

1990s: consumer product wave

Class actions became a major tool for tobacco, pharmaceutical, and defective product cases. Punitive damage awards grew large enough to attract defendant lobbying for reform.

2005: Class Action Fairness Act (CAFA)

Congress responded to concerns about state-court class action abuse by expanding federal jurisdiction over large multi-state class actions. Moved most consumer class actions into federal court.

2011: AT&T v. Concepcion

The Supreme Court held that mandatory arbitration clauses (with class waivers) in consumer contracts were enforceable under the Federal Arbitration Act. This dramatically reduced class actions in industries with strong arbitration clauses (phone, cable, financial services).

2015-present: data breach and privacy era

Massive data breaches created a new class action category. Combined with California's consumer privacy law (CCPA) and Illinois BIPA, privacy-tracking class actions grew into a significant sector.

Where things stand now

Modern class actions produce billions in annual settlement value across data breach, privacy, wage and hour, consumer product, and antitrust categories. Roughly 5-15% of eligible consumers actually file — the low participation rate is the current era's biggest challenge for the class action system.