[5] Believing that control of the United States government had been seized by special interest groups and no longer cared for the voters who elected it, Cox filed a pro bono class action lawsuit on July 9, 1979, on behalf of every American citizen directly in the Supreme Court of the United States, which was denied without comment.

Cox investigated and sued a group of radical right-wing organizations, including the Liberty Lobby and Institute for Historical Review,[8][9] that engaged in Holocaust denial and which had offered a reward for proof of Nazi gas chambers.

[10][11] The primary legal issue in the case was resolved in October 1981, when Los Angeles County Superior Court Judge Thomas T. Johnson took judicial notice of the fact that "Jews were gassed to death at Auschwitz in the summer of 1944.

[13] In 1991, Cox arranged for the publication of almost 1,800 photographs of the Dead Sea Scrolls under the control of the École Biblique that had been suppressed for more than 40 years.

[16][17] The Huntington Library in California subsequently allowed all "qualified scholars" to study its set of photographs, and the Israel Antiquities Authority permitted the publication of a microfiche edition.