Exploring the dilemma and responsibilities of power, this social studies unit begins with an article by a Chinese Communist who attacks America as aggressively imperialistic and ends with an article by an Englishman who lauds American imperialism. Sections of the unit discuss (1) the nature of imperialism, (2) the substance of European imperialism, as well as the political pressures and ideologies, at the end of the 19th century, (3) the imperialistic course taken in the early 20th century by the United States in the Philippines and the Caribbean, and (4) the burden of responsibility today in such places as the Dominican Republic and Vietnam. Excerpts from "The Congressional Record" and from messages by Woodrow Wilson, Theodore Roosevelt, and Cordell Hull are included as well as charts which compare the economic growth of the world's empires at the turn of the 19th century and which indicate significant events in recent United States History. [Not available in hard copy due to marginal legibility of original document.] (Author/JB)