The Robert Lansing Papers document the later years of Robert Lansing (1864-1928), lawyer, writer, and the longest serving of Woodrow Wilson's three Secretaries of State. During his tenure as Secretary of State (June 23, 1915 to February 13, 1920), the United States entered the First World War on the side of the Entente Powers. Deliberations and negotiations associated with the precarious neutrality which preceded this event and the troubled peace which followed it dominated Lansing's time in office and are reflected in his papers. Lansing's interests as a lawyer, which were international in scope and substance, and the diverse subjects which commanded his attention as a writer – subjects ranging from biblical history to English etymology – are also evident. The Lansing Papers consist of official papers, personal papers, writings and speeches, diaries, sketches, and photographs. Though by no means exhaustive, they shed light on many aspects of Lansing's life and times.