Book excerpt: The American Search for Opportunity, 1865-1913 analyzes the period between the American Civil War and World War I (1865-1913) as the formative basis for twentieth-century American world power--"The American Century" as it has become known--and examines the "Imperial Presidency" that these roots produced. The extent of U.S. power was so great that it not only transformed American society, but reshaped other societies around the globe as well, by helping fuel--and in some cases directly causing--the great revolutions of the late-nineteenth and early-twentieth centuries in Mexico, Russia, China, Cuba, Hawaii, the Philippines, Panama, and Central America. The book, therefore, not only examines American history, but the history of many other areas that were dramatically affected by U.S. power as they entered the twentieth century.