In a graduate seminar in 1977 Ann Hibner Koblitz criticized an article by political scientist Samuel Huntington for misusing mathematics in an attempt to buttress his arguments. This led her husband Neal Koblitz to include her critique in an article he wrote on "Mathematics as Propaganda," and this in turn inspired Yale mathematician Serge Lang to lead a campaign against the election of Huntington to the National Academy of Sciences. The journalist Charles Sykes, who describes the episode in detail in his book Profscam, writes that Despite the vigorous defense of Huntington by Nobel Prize winning economistHerbert Simon, Lang's campaign was successful, and Huntington was twice voted down by the Academy's members. In the 1980s and 1990s Koblitz was a critic of the gender essentialism of Evelyn Fox Keller, who maintained that modern science is inherently patriarchal and ill-suited for women. Koblitz argued that Keller failed to appreciate the multi-faceted nature of scientific research and the great diversity of experiences of women across cultures and time periods. For example, in the 19th century the first women to earn advanced university degrees in Europe in any field were almost all in the natural sciences and medicine. In an article about the first 20 years of the Association for Women in Mathematics, the mathematician and former AWM president Lenore Blum wrote In the 1990s and early 2000s a group of archaeologists, led by Steven A. LeBlanc of Harvard, popularized the notion that warfare was endemic among all prehistoric peoples. Koblitz analyzed the writings of this group, compared them to other sources, and concluded that the claim of pervasive warfare among the ancient Hohokam people of present-day central Arizona is a modern "masculinist narrative" that has little support in the archaeological record. After speaking at the Old Pueblo Archaeology Center near Tucson, Arizona, Koblitz was asked to write a version of her Men and Masculinities article for the Center's Bulletin. In that article she wrote:
Philanthropy
In 1985 Koblitz and her husband Neal established the Kovalevskaia Fund as a nonprofit organization whose purpose is to support and encourage women in developing countries in science, mathematics, engineering, and medicine. It was originally aimed at promoting women in the sciences in Vietnam; it grew out of Ann's work on the history of women and science, her and Neal's experience in the opposition to United States involvement in the Vietnam War, and their efforts to help promote science in Vietnam afterwards. Grants were at first made solely in Vietnam, but were eventually extended to other developing countries.
In 1990, Koblitz won the History of Science Society's Margaret W. Rossiter History of Women in Science Prize for her article "Science, Women, and the Russian Intelligentsia: The Generation of the 1860s" that appeared in the Society's journal Isis in 1988.
In 2015, Koblitz won the "Transdisciplinary Book Award" of the Arizona State University Institute for Humanities Research for her book Sex and Herbs and Birth Control: Women and Fertility Regulation Through the Ages.