Anna Eleanor Roosevelt ( EL-in-or ROH-zə-velt; October 11, 1884 – November 7, 1962) was an American political figure, diplomat, and activist. She was the longest-serving first lady of the United States, during her husband Franklin D. Roosevelt's four terms as president from 1933 to 1945. Through her travels, public engagement, and advocacy, she largely redefined the role. Widowed in 1945, she served as a United States delegate to the United Nations General Assembly from 1945 to 1952, and took a leading role in designing the text and gaining international support for the Universal Declaration of Human Rights. In 1948, she was given a standing ovation by the assembly upon their adoption of the declaration. President Harry S. Truman called her the "First Lady of the World" in tribute to her human rights achievements.
Roosevelt was a member of the prominent and wealthy Roosevelt and Livingston families and a niece of President Theodore Roosevelt. She had an unhappy childhood, having suffered the deaths of both parents and one of her brothers at a young age. At 15, she attended Allenswood Boarding Academy in London and was deeply influenced by its founder and director Marie Souvestre. Returning to the U.S., she married her fifth cousin once removed, Franklin Delano Roosevelt, in 1905. Between 1906 and 1916 she gave birth to six children, one of whom died in infancy. The Roosevelts' marriage became complicated after Eleanor discovered her husband's affair with her social secretary, Lucy Mercer, in 1918. Due to mediation by her mother-in-law, Sara, the liaison was ended officially. After that, both partners started to keep independent agendas, and Eleanor joined the Women's Trade Union League and became active in the New York state Democratic Party. Roosevelt helped persuade her husband to stay in politics after he was stricken with a paralytic illness in 1921. Following Franklin's election as governor of New York in 1928, and throughout the remainder of Franklin's political career, Roosevelt regularly made public appearances on his behalf; and as first lady, while her husband served as president, she greatly influenced the present scope and future of the role.