This is the first full-length study of one of the major political figures of twentieth-century America, Hiram Johnson (1866-1945). Elected governor of California in 1910, reelected in 1914, and elevated to the United States Senate in 1916, he characteristically cut his own political path, bringing an apocalyptic intensety to the many battles he waged. Armed with a sharp wit, a talent for invective, and a capacity for self-righteousness, he invigorated the political order around him with the passion he invested in it. Stubbornly independent, he pursued his goals with a fighter's determination. For Johnson, politics was an art not of compromise but of confrontation. As he himself put it, he preferred to be a "bloc of one." Johnson began his political career as an insurgent, a progressive in the stamp of Robert La Follette and Theodore Roosevelt. As governor he thoroughly revamped California's political and social order, creating a legacy that can still be felt today. He helped shape a progressive movement on the national level as well, and was Theodore Roosevelt's running mate on the Progressive party ticket in 1912. Johnson left the governorship in 1917, midway through his second term, to enter the United States Senate, where he served until his death in 1945. Arriving on the eve of America's entry into World War I, he continued to define himself as a reformer but quickly embraced a second cause as well, becoming one of the nation's most adamant proponents of American isolationism. He opposed American entry into the League of Nations in 1919, fought persistently against U.S. entanglement abroad throughout the inter-war years, and from his deathbed voted in 1945 against American entry into the United Nations. Although today he is best remembered as a fierce and uncompromising isolationist, his accomplishments in the Senate as a progressive - such as his decade-long fight for Hoover Dam - were significant and lasting. Johnson's public career encompasses and illuminates almost all the significant political issues, both domestic and international, in American life during the first half of the twentieth century.