The Vietnam War’s campus teach-ins helped inspire Earth Day’s original organizing model. These forums showed organizers how students, faculty, speakers, and community members could gather for extended public education and debate around a major national issue.
The teach-in format became prominent during the U.S. involvement in Vietnam. The first widely recognized teach-in took place at the University of Michigan in March 1965 and continued overnight, combining lectures, discussion, films, and music. Similar events spread to college campuses across the country.
Senator Gaylord Nelson drew on the energy of the antiwar movement when he proposed a nationwide environmental teach-in. He recruited Denis Hayes to coordinate the campaign, which developed into the first Earth Day on April 22, 1970. The organizers broadened the model beyond universities to include schools, neighborhood groups, rallies, cleanups, and demonstrations.
Earth Day was not simply an antiwar event under another name. Its subject was environmental protection, and the 1970 campaign attracted a wide coalition. But the Vietnam-era campus movement supplied an important organizational precedent: decentralized, participatory events that could connect local action with a national cause.