Indians, pioneers, land rushes, and oil dominate many an American's picture of Oklahoma's history. Incomplete as such an impression is, the frontier experience did leave a heritage of individualism distinctive of Oklahoma character. Oklahoma retains much of its popular renown as a land of cowboys and Indians, oil derricks, and multimillionaires. But it has become something quite different, as well: a state prospering from agriculture, diversified industry, and growing urban centers where a majority of Oklahomans now live. Though the state has changed greatly since its frontier beginnings, its...