Stimson, Henry Lewis (1867–1950), a United States statesman. He was secretary of war in President Taft's cabinet (1911–13) and in the cabinets of Presidents Roosevelt and Truman (1940–45) during World War II, and secretary of state under President Hoover (1929–33). When Japan invaded Manchuria and set up the puppet state of Manchukuo in 1932, Stimson announced that the United States would not recognize treaties and territories resulting from aggression. This policy was afterward called the Stimson Doctrine. During World War II, Stimson was among those who urged the dropping of the atomic bombs on Japan, a decision he later questioned.
Stimson was born in New York City. He graduated from Yale University (1888), earned an advanced degree from Harvard University (1889), and attended Harvard Law School. He was admitted to the bar in 1891 and began the practice of law in 1893. In 1906 Stimson was appointed United States attorney for the southern district of New York.
Stimson served in France as a colonel of field artillery during World War I. In 1927, President Coolidge sent him to Nicaragua to settle a dispute over the Nicaraguan presidency. The same year Stimson was made governor general of the Philippine Islands. As Hoover's secretary of state he was active at the London Naval Conference (1930–31) and at the Geneva Disarmament Conference of 1932.
A Republican party leader, Stimson was criticized by some Republicans for serving as secretary of war in the cabinets of Democratic Presidents Roosevelt and Truman.