Original sentence: Brendan O'Connor argues that proto-anti-Americanism developed in Europe in the eighteenth and nineteenth centuries, with the view that the United States was culturally backward.British author Frances Trollope says in her Domestic Manners of the Americans that the most important difference between English and Americans is "want of refinement", explaining that "that polish which removes the coarser and rougher parts of our nature is unknown and undreamed of" in America
Edited sentence: A more general proto-anti-Americanism developed in the eighteenth and nineteenth centuries in Europe that viewed the United States as culturally backward.British author Frances Trollope was decisive in shaping 19th century European attitudes; in her Domestic Manners of the Americans she observes that the most important difference between English and Americans is "want of refinement", explaining that "that polish which removes the coarser and rougher parts of our nature is unknown and undreamed of" in America.The sense of a cocksure character amongst Americans continued throughout the nineteenth century