The two men seemed to live in eerily parallel Americas. McKinley was to his contemporaries an enigma, a president whose conflicted feelings about imperialism reflected the country’s own. Under its popular Republican commander-in-chief, the United States was undergoing an uneasy transition from a simple agrarian society to an industrial powerhouse spreading its influence overseas by force of arms. Czolgosz was on the losing end of the economic changes taking place—a first-generation Polish immigrant and factory worker sickened by a government that seemed focused solely on making the rich richer. With a deft narrative hand, journalist Scott Miller chronicles how these two men, each pursuing what he considered the right and honorable path, collided in violence at the 1901 Pan-American Exposition in Buffalo, New York.