Between 1919, when he founded the Hoover Institution, and his death in 1964, Herbert Hoover routinely deposited his papers in the Library & Archives. Those papers mainly concern his relief activities during and after World Wars I and II, his political and personal philosophy, his public service activities, his speeches and writings, and his postpresidential career. Scholars interested in Hoover's papers from his tenure as secretary of commerce (1921–28) and United States president (1929–33) will find them at the Herbert Hoover Presidential Library in West Branch, Iowa.