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Abbot Howard Hoffman (November 30, 1936 - April 12, 1989) was an American political and social activist, anarchist, and revolutionary who co-founded the Youth International Party ("Yippies"). Hoffman was arrested and tried for conspiracy and inciting to riot as a result of his role in protests that led to violent confrontations with police during the 1968 Democratic National Convention, along with Jerry Rubin, David Dellinger, Tom Hayden, Rennie Davis, John Froines, Lee Weiner, and Bobby Seale. The group was known collectively as the "Chicago Eight"; when Seale's prosecution was separated from the others, they became known as the Chicago Seven. While the defendants were initially convicted of intent to incite a riot, the verdicts were overturned on appeal.

Hoffman was arrested and tried for conspiracy and inciting to riot as a result of his role in anti-Vietnam War protests, which were met by a violent police response during the 1968 Democratic National Convention in Chicago. He was among the group that came to be known as the Chicago Seven (originally known as the Chicago Eight), which included fellow Yippie Jerry Rubin, David Dellinger, Rennie Davis, John Froines, Lee Weiner, future California state senator Tom Hayden and Black Panther Party co-founder Bobby Seale (before his trial was severed from the others).  Presided over by Judge Julius Hoffman (no relation to Hoffman, about which he joked throughout the trial), Abbie Hoffman's courtroom antics frequently grabbed the headlines; one day, defendants Hoffman and Rubin appeared in court dressed in judicial robes, while on another day, Hoffman was sworn in as a witness with his hand giving the finger. Judge Hoffman became the favorite courtroom target of the Chicago Seven defendants, who frequently would insult the judge to his face. Abbie Hoffman told Judge Hoffman "you are a 'shande fur de Goyim' [disgrace in front of the gentiles]. You would have served Hitler better." He later added that "your idea of justice is the only obscenity in the room." Both Davis and Rubin told the Judge "this court is bullshit." When Hoffman was asked in what state he resided, he replied the "state of mind of my brothers and sisters".  Other celebrities were called as "cultural witnesses" including Allen Ginsberg, Phil Ochs, Arlo Guthrie, Norman Mailer and others. Hoffman closed the trial with a speech in which he quoted Abraham Lincoln, making the claim that the president himself, if alive today, would also be arrested in Chicago's Lincoln Park.  On February 18, 1970, Hoffman and four of the other defendants (Rubin, Dellinger, Davis, and Hayden) were found guilty of intent to incite a riot while crossing state lines. All seven defendants were found not guilty of conspiracy. At sentencing, Hoffman suggested the judge try LSD and offered to set him up with "a dealer he knew in Florida" (the judge was known to be headed to Florida for a post-trial vacation). Each of the five was sentenced to five years in prison and a $5,000 fine.  However, all convictions were subsequently overturned by the Seventh Circuit Court of Appeals. The Walker Commission later found that in fact it had been a "police riot".
Abbie Hoffman