This latest volume in the definitive six-volume biography of Herbert Hoover tracks Hoover's life and career from 1918 to 1928-a period defined largely by his role as United States Secretary of Commerce and leading directly to his election as the thirty-first President of the United States. It tells the story of how Hoover the engineering progressive turned relief and war manager developed a public philosophy for dealing with a wide array of problems. It also fits Hoover into the larger thought, action, and developmental patterns of the period, interweaving his family matters, business affairs, and other projects with the larger historical context.