填空题
.Resemblances between Roman history and the history of Great Britain or the United States in the 19th and 20th centuries have often been noted. Like America's, the Roman economy evolved from a simple agrarianism to a complex urban system with problems of unemployment, gross disparity of wealth, and financial crises. Like the British Empire, the Roman Empire was founded on conquest. And like both the British and American empires, the Roman Empire justified itself by celebrating the peace its conquest allegedly brought to the world.