After college Caroline Lexow became active full-time in the suffrage movement, as executive secretary assisting
Harriot Stanton Blatch in running the Women's Political Union, as president of the
College Equal Suffrage League of New York, and as executive secretary of the National College Equal Suffrage League. "On the day of my graduation," she told audiences while touring as a suffrage organizer in 1909, "I became actively interested in suffrage work and a member of the League, and I expect to devote the most of my time to the cause until it wins." In 1921, Babcock was one of the members of the
Women's Peace Society who left to start the
Women's Peace Union. In that same year, she chaired a women's peace march in New York City. Babcock and
Elinor Byrns drafted a constitutional amendment calling for the power to declare or prepare for war to be removed from the powers of the U. S. Congress. She included the Boy Scouts among her targets, calling scouting a "kindergarten for war." Caroline Lexow Babcock was on the Executive Committee and board of directors of the
Birth Control Federation of America. ==Personal life and legacy==