Dorothy Day was an American journalist, social activist and anarchist who, after a bohemian youth, became a Catholic without abandoning her social and anarchist activism. She was perhaps the best-known political radical among American Catholics.

The Silent Sentinels, also known as the Sentinels of Liberty, were a group of over 2,000 women in favor of women's suffrage organized by Alice Paul and the National Woman's Party, who nonviolently protested in front of the White House during Woodrow Wilson's presidency starting on January 10, 1917. Nearly 500 were arrested, and 168 served jail time. They were the first group to picket the White House. Later, they also protested in Lafayette Square, not stopping until June 4, 1919 when the Nineteenth Amendment to the United States Constitution was passed both by the House of Representatives and the Senate.