This series contains the records of the American Peace Society, including governance documents, correspondence, meeting minutes, annual reports, constitution, articles of incorporation, and other documents. Correspondents include Rose Dabney Forbes, as well as other officers of the society, including James L. Tryon. Topics include the celebration of 100 years of peace between the United States and Great Britain and the extension of the society into state branches.

The Massachusetts Branch of the Woman's Peace Party, chaired by Rose Dabney Forbes, was established in 1915. In 1918, it voted to change its name to the League for Permanent Peace and broke its affiliation with the National Woman's Peace Party. The League was disbanded in 1920. This series contains the records of the Massachusetts branch of the Woman's Peace Party, including correspondence, meeting minutes, and annual meeting reports. The correspondence includes letters regarding Rose Dabney Forbes' views on the peace movement and the design of a celluloid pin for the organization.

This series contains the correspondence of the World Peace Foundation relating to work done in connection with the Massachusetts Peace Society. Correspondents include Rose Dabney Forbes and Edwin D. Mead, chief director. Included are a number of letters concerning Edwin D. Mead's views on the Third Hague Conference, 1913, and Winston Churchill's speech, 1913, on the same subject. Also included is a letter from Mead to Forbes explaining the work done by the foundation.

This series contains addresses by Rose Dabney Forbes and others. Included in this series are descriptions of a stereopticon lecture renouncing war given by Henry S. Haskins for the Massachusetts Peace Society in 1916 and 1917, as well as another stereopticon lecture given by James L. Tryon on the 100 years of peace between the United States and Great Britain in 1914. Also included are addresses by Jay William Hudson, a lecturer for the Massachusetts Peace Society. Topics of the addresses include peace and war, international relations, military training for boys in public schools and the Boy Scouts, and eulogies for two officers of the Massachusetts Peace Society, Samuel Billings Capen, president, and William A. Mowry, a member of the board of directors.

This series contains various political resolutions pertaining to war and the peace movement during the time of America's entrance in the First World War and the years surrounding it. Papers include resolutions and telegrams sent to members of the United States government, as well as political statements and press releases. Topics include the formation of a League of Nations, the Panama Canal Act, the Kellogg-Briand Pact, and numerous appeals for volunteers in the peace movement. Also included in this series are bills and resolutions from the United States Senate and House of Representatives.

This series contains miscellaneous items collected by Rose Dabney Forbes during her work with various peace societies. Included are programs and leaflets; political songs, poems, and prayers; and newspaper clippings.