Editing Daniel Ellsberg (section)

==RAND Corporation and PhD==
Ellsberg began working as a strategic analyst at the [[RAND Corporation]] for the summer of 1958 and then permanently in 1959.<ref>{{cite episode
 | title = Daniel Ellsberg Explains Why He Leaked The Pentagon Papers
 | url = https://www.npr.org/2018/01/19/579101965/daniel-ellsberg-explains-why-he-leaked-the-pentagon-papers | series = Fresh Air | series-link = Fresh Air
 | credits = Host: Dave Davies | network = National Public Radio
 | station = WHYY-FM | air-date = December 4, 2017 }}</ref> He concentrated on [[nuclear strategy]], working with leading strategists such as [[Herman Kahn]] and challenging the existing plans of the [[United States National Security Council]] and [[Strategic Air Command]].<ref name=Anderson>{{citation |last=Anderson |first=David L. |page=201 |title=The Human Tradition in the Vietnam Era |year=2000 |publisher=Rowman & Littlefield |isbn=978-0-8420-2763-2 |chapter=Daniel Ellsberg}}</ref>

Ellsberg completed a PhD in economics from Harvard in 1962.<ref name=bookragsbio>Daniel Ellsberg Biography @ Encyclopedia of World Biography, via [http://www.bookrags.com/biography/daniel-ellsberg BookRags.com]</ref> His dissertation on [[decision theory]] was based on a set of thought experiments that showed that decisions under conditions of [[uncertainty]] or [[ambiguity]] generally may not be consistent with well-defined subjective probabilities. Now known as the [[Ellsberg paradox]],<ref name=Ellsberg1961>{{Cite journal |last=Ellsberg|first=Daniel|author-link=Daniel Ellsberg|journal=[[Quarterly Journal of Economics]]|volume=75|title=Risk, Ambiguity, and the Savage Axioms|year=1961|pages=643–669 |doi=10.2307/1884324|issue=4 |jstor=1884324 |url=http://www.dklevine.com/archive/refs47605.pdf}}</ref> it formed the basis of a large literature that has developed since the 1980s, including approaches such as [[Choquet expected utility]] and [[info-gap decision theory]].<ref>{{citation |url=https://www.cmu.edu/dietrich/sds/docs/golman/information-gaps-for-risk-and-ambiguity-golman_gurney_loewenstein-final-june-2020.pdf |title=Information Gaps for Risk and Ambiguity |publisher=Carnegie Mellon University |year=2020 |author1=Russell Golman |author2=Nikolos Gurney |author3=George Loewenstein}}</ref>

Ellsberg worked in [[the Pentagon]] from August 1964<ref name=BBC4>[[BBC Four]] ''[[Storyville (television series)|Storyville]] – 2009–2010 – 14. The Most Dangerous Man in America''</ref> under [[United States Secretary of Defense|Secretary of Defense]] [[Robert McNamara]] as special assistant to Assistant Secretary of Defense for International Security Affairs [[John McNaughton (government official)|John McNaughton]]. He then went to [[South Vietnam]] for two years, working for General [[Edward Lansdale]] as a member of the [[United States Department of State|State Department]].<ref>{{citation |url=https://spartacus-educational.com/JFKellsberg.htm |title=Daniel Ellsberg |publisher=Spartacus Educational |author=John Simkin |year=1997}}</ref>

On his return from South Vietnam, Ellsberg resumed working at RAND. In 1967, he contributed with 33 other analysts to a top-secret 47-volume study of [[Classified information|classified]] documents on the conduct of the Vietnam War, commissioned by Defense Secretary McNamara and supervised by [[Leslie H. Gelb]] and [[Morton Halperin]].<ref name=upi1971yearinreview>{{cite web|title=The Pentagon Papers|work=1971 Year in Review|agency=United Press International|year=1971|url=http://www.upi.com/Audio/Year_in_Review/Events-of-1971/The-Pentagon-Papers/12295509436546-7|access-date=July 2, 2010}}</ref><ref name="Sheehan on authors 1971"/><ref name="Goldsmith 2011"/> These 7,000 pages of documents, completed in late 1968 and presented to McNamara and [[Clark Clifford]] early in the following year, later became known collectively as the "Pentagon Papers".<ref>{{cite web |url=http://www.movieweb.com/movie/FIjiysnlYYSwnm/REqtSvvuifNltz |title=The Most Dangerous Man in America: Daniel Ellsberg and the Pentagon Papers (2010) |publisher=Movieweb.com |access-date=December 2, 2010 |archive-url=https://web.archive.org/web/20100125071147/http://www.movieweb.com/movie/FIjiysnlYYSwnm/REqtSvvuifNltz |archive-date=January 25, 2010 |url-status=dead }}</ref><ref name="Goldsmith 2011">{{cite web |last=Goldsmith|first=Rick |title=Opinion - Tale of the Pentagon Papers | website=The New York Times | date=June 11, 2011 | url=https://www.nytimes.com/2011/06/12/opinion/l12pentagon.html | access-date=June 27, 2023}}</ref><ref name="Sheehan on authors 1971 ">{{cite web |last=Sheehan|first=Neil| title=Most Authors Were Given A Promise of Anonymity | website=The New York Times | date=June 18, 1971 | url=https://www.nytimes.com/1971/06/18/archives/most-authors-were-given-a-promise-of-anonymity-pledge-was-given.html | access-date=June 27, 2023}}</ref>