After working as a teacher and curriculum developer, Ehrlich began creating documentaries in the 1980s.[4] In the 1990s, she began work for National Public Radio that included research into American history with a focus on pacifism. Some of this research was incorporated into the documentary The Good War and Those Who Refused to Fight It, about conscientious objectors during World War II, that she wrote and directed with Rick Tejeda-Flores.[4] The documentary features several conscientious objectors, including Stephen Cary, Bill Sutherland, David Dellinger, and Lew Ayres,[4] is narrated by Ed Asner and includes archival footage.[5][6] The film was completed in 2000 and broadcast on PBS in January 2002.[4]
For the 2009 documentary The Most Dangerous Man in America, Ehrlich and her co-director Rick Goldsmith have said they began speaking with Daniel Ellsberg in 2004 about the development of a film, and then spent several years conducting research and obtaining access to archival footage before they began filming in 2007.[1]