Test analysis: This question mainly examines students' memory of the content of the textbook. After the American War of Independence, it was established as a confederate country. Under this regime, the newly independent United States soon encountered many unsolvable problems, such as the inability to effectively trade at home and abroad, the inability to repay debts, and the inability to protect national security. In addition, the United States is made up of thirteen British colonies, which have not experienced feudal society and have been influenced by the Enlightenment, especially Montesquieu's theory of separation of powers. At the same time, American political leaders realized that it is necessary to establish a democratic government to benefit the development of the country. At the same time, the capitalist economy in the United States has developed.