Catt was also a leader of the international women's suffrage movement. She helped to found the International Woman Suffrage Alliance (IWSA) in 1902, which eventually incorporated sympathetic associations in 32 nations. She served as its president from 1904 until 1923. After George Catt's death in 1905, Catt spent much of the following eight years as IWSA president promoting equal-suffrage rights worldwide. After she retired from NAWSA, she continued to help women around the world to gain the right to vote. The IWSA remains in existence today, now as the International Alliance of Women, with 31 full members and 24 associate members.