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William C. Davidon

1927 – 2013

American physicist and peace and anti-repression activist

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About William C. Davidon

Lived 1927 – 2013 (aged 86). William C. Davidon was an American mathematician, physicist and university teacher, known for Citizens' Commission to Investigate the FBI and Quasi-Newton method.

William Cooper Davidon (March 18, 1927 – November 8, 2013) was an American professor of physics and mathematics, and a peace activist. As the mastermind of the March 8, 1971, FBI office break-in, in Media, Pennsylvania, Davidon was the informal leader of the Citizens' Commission to Investigate the FBI. The Media break-in resulted in the disclosure of COINTELPRO, which in turn led to subsequent investigations and reforms of the FBI.

Life Davidon was born in Fort Lauderdale, Florida, in 1927. He attended Purdue University and graduated from the University of Chicago with a B.S. (1947), masters (1950), and Ph.D. (1954) in physics. From 1954 to 1956, Davidon was a research associate at the Enrico Fermi Institute. From 1956 to 1961, he was an associate physicist at the Argonne National Laboratory, where he developed the first quasi-Newton algorithm, now known as the Davidon–Fletcher–Powell formula.

Davidon was professor of physics at Haverford College from 1961 to 1981, and then Professor of Mathematics (1981–1991), as his interests shifted to include mathematical logic, set theory and non-standard analysis. Davidon was a 1966 Fulbright Scholar. He retired in 1991.

Davidon moved to Highlands Ranch, Colorado, in 2010. He died November 8, 2013, of Parkinson's disease.

Activism In 1966, Davidon traveled to South Vietnam, with A. J. Muste, sponsored by the Committee for Non-Violent Action. He also announced that year that he would be refusing to pay his federal income tax in protest against the Vietnam War. Later, he became a sponsor of the War Tax Resistance project, which practiced and advocated tax resistance as a form of anti-war protest. In 1971, he was named an "unindicted co-conspirator" in the Harrisburg Seven case. During much of this time, he served on the board of directors of the American Civil Liberties Union, Philadelphia affiliate. According to The Burglary, a book published shortly after his death, Davidon also had engaged in draft board raids, stealing or destroying files, and subsequent to Media participated in two acts of sabotage against military materiel intended for use in Vietnam. Due at least in part to his exceptionally careful planning and his co-conspirators' total commitment to secrecy and discretion, neither he nor anyone else was ever charged in any of those actions, despite an intense, five-year FBI investigation.

Family

In 1963, Davidon married Ann Morrissett (1925–2004), a noted pacifist/feminist essayist and activist. They had two daughters Sarah Davidon and Ruth Rodgers. Davidon and Morrissett divorced in 1978. who died in 2010. Davidon had a son, Alan (1949– ), from his first marriage to Phyllis Wise (1927– ). Davidon also had a child with Zuzana (Suzanne) Libich, née Freund (b. 1928, Prague – d. 2006, Munich), an interpreter and peace activist during the 1968 Prague Spring. They met at the Pugwash Conference in Marienbad in 1969. Aimée (b. 1970) is an artist and engineer in Los Angeles, California.

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Important facts

Birth century
Nationality
Known for
Citizens' Commission to Investigate the FBI, Quasi-Newton method
Education
University of Chicago, Purdue University
Also known as
William Cooper Davidon

People in William C. Davidon's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped William C. Davidon's

Frequently asked questions

Who was William C. Davidon?

American physicist and peace and anti-repression activist

When was William C. Davidon born?

William C. Davidon was born on 18 March 1927 in Fort Lauderdale.

When did William C. Davidon die?

William C. Davidon died on 8 November 2013 in Highlands Ranch.

What was William C. Davidon's occupation?

William C. Davidon was a mathematician, physicist and university teacher.

What was William C. Davidon known for?

William C. Davidon was known for Citizens' Commission to Investigate the FBI and Quasi-Newton method.

What nationality was William C. Davidon?

William C. Davidon was American.

Sources & further reading

· Wikipedia: William C. Davidon

· Wikidata: Q15619198

· DBpedia: William C. Davidon

Cite this page

APA: Biography.guide. (2026). William C. Davidon. https://biography.guide/william-c-davidon/

MLA: "William C. Davidon." Biography.guide, https://biography.guide/william-c-davidon/.

Chicago: "William C. Davidon." Biography.guide. https://biography.guide/william-c-davidon/.

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