Frances Elizabeth Caroline Willard was an American educator, temperance reformer, and women's suffragist. Willard became the national president of Woman's Christian Temperance Union (WCTU) in 1879 and remained president until her death in 1898. Her influence continued in the next decades, as the Eighteenth and Nineteenth Amendments to the United States Constitution were adopted. Willard developed the slogan "Do Everything" for the WCTU and encouraged members to engage in a broad array of social reforms by lobbying, petitioning, preaching, publishing, and education. During her lifetime, Willard succeeded in raising the age of consent in many states as well as passing labor reforms including the eight-hour work day. Her vision also encompassed prison reform, scientific temperance instruction, Christian socialism, and the global expansion of women's rights.

The Woman's Christian Temperance Union (WCTU) is an international temperance organization. It was among the first organizations of women devoted to social reform with a program that "linked the religious and the secular through concerted and far-reaching reform strategies based on applied Christianity." It plays an influential role in the temperance movement. Originating among women in the United States Prohibition movement, the organization supported the 18th Amendment and was also influential in social reform issues that came to prominence in the progressive era.