Abbot Howard Hoffman was an American political and social activist who co-founded the Youth International Party ("Yippies") and was a member of the Chicago Seven. He was also a leading proponent of the Flower Power movement.
Hoffman in 1981
Hoffman (center) visiting the University of Oklahoma to protest the Vietnam War, c. 1969
Hoffman in Tallahassee, Florida, 1989
Abbie Hoffman protesting the Point Pleasant Pumping Station in Plumstead, Pennsylvania in 1987
Youth International Party
The Youth International Party (YIP), whose members were commonly called Yippies, was an American youth-oriented radical and countercultural revolutionary offshoot of the free speech and anti-war movements of the late 1960s. It was founded on December 31, 1967. They employed theatrical gestures to mock the social status quo, such as advancing a pig as a candidate for President of the United States in 1968. They have been described as a highly theatrical, anti-authoritarian, and anarchist youth movement of "symbolic politics".
YIP poster advertising the 1968 Festival of Life.
A "Yippie!" button on display at the Chicago History Museum
Poster advertising Yippie-sponsored Pittsburgh Smoke-In, Schenley Park, July 2, 1977
Poster advertising Yippie-sponsored Smoke-In at Ohio State University, April 29, 1978.