Amid the geopolitical and social turmoil of the 1970s, the United Nations declared 1975 as International Women's Year. The capstone event, a two-week conference in Mexico City, was dubbed by organizers and journalists as "the greatest consciousness-raising event in history." The event drew an all-star cast of characters, including Soviet cosmonaut Valentina Tereshkova, Iranian Princess Ashraf Pahlavi, and US feminist Betty Friedan, as well as a motley array of policymakers, activists, and journalists.

International Women's Year, the first book to examine this critical moment in feminist...