Dispelling the common notion that American women became activists in the fight against female cancer only after the 1970s, Kirsten E. Gardner traces women's cancer education campaigns back to the early twentieth century. Focusing on breast cancer, but using research on cervical, ovarian, and uterine cancers as well, Gardner's examination of films, publications, health fairs, and archival materials shows that women have promoted early cancer detection since the inception of the American Society for the Control of Cancer in 1913. While informing female audiences about cancer risks, these early activists also laid the groundwork for the political advocacy and patient empowerment movements of recent decades. By the 1930s there were 300,000 members of the Women's Field Army working together with women's clubs to hold explicit discussions about the risks, detection, and incidence of cancer. The feminist health movement of the 1970s, Gardner explains, heralded a departure for female involvement in women's health activism. As before, women encouraged early detection, but they simultaneously demanded increased attention to gender and medical research, patient experiences, and causal factors. Our understanding of today's vibrant feminist health movement is enriched by Gardner's work recognizing women's roles in grassroots educational programs throughout the twentieth century and their creation of supportive networks that endure today.