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How did the 1981 PATCO strike affect the use of replacement workers in the United States?

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The Code of Hammurabi diorite stela, with carved figures at the top showing Hammurabi seated with cuneiform inscriptions below. — Labour law Diorite stela inscribed with the Code of Hammurabi, 18th century bce.

The 1981 Professional Air Traffic Controllers Organization (PATCO) strike served as a watershed moment for the use of replacement workers in the United States. Prior to this event, the practice of hiring permanent replacements to break a strike was rarely employed on a large scale.1

When President Ronald Reagan declared the strike illegal and ordered the hiring of permanent replacement controllers, it signaled a significant shift in labor relations. While National Labor Relations Board regulations generally permit permanent replacements only during economic strikes—and not during strikes over unfair labor practices—the federal government's decisive action against the PATCO union weakened the broader power of labor organizations.21

This precedent increased the perceived risk of job loss for union members, contributing to a sharp decline in the frequency and duration of economic strikes across the country. In response, American unions have increasingly adopted alternative strategies, such as selective and rolling strikes, to minimize the employer's ability to utilize replacement workers.1