The National Council of Women of the United States (NCW/US) is the oldest nonsectarian organization of women in the United States Founded in 1888, the NCW/US is an accredited non-governmental organization (NGO) with the Department of Public Information (UN/DPI) and in Consultative Status with the Economic and Social Council of the United Nations (ECOSOC).

May Wright Sewall was an American reformer, who was known for her service to the causes of education, women's rights, and world peace. She was born in Greenfield, Milwaukee County, Wisconsin. Sewall served as chairman of the National Woman Suffrage Association's executive committee from 1882 to 1890, and was the organization's first recording secretary. She also served as president of the National Council of Women of the United States from 1897 to 1899, and president of the International Council of Women from 1899 to 1904. In addition, she helped organize the General Federation of Women's Clubs, and served as its first vice-president. Sewall was also an organizer of the World's Congress of Representative Women, which was held in conjunction with the World's Columbian Exposition in Chicago in 1893. U.S. President William McKinley appointed her as a U.S. representative of women to the Exposition Universelle (1900) in Paris.