Speaker A: "Between the Civil War and World War I, the states could not meet the problems created by economic change. The Federal government had to take up the challenge and round the means to do it in the Federal Constitution."Speaker B: "There is evidence that many Americans, as far back as the early days of the United States, believed in greater centralization of authority."Speaker C: "I see a danger in any lessening of the power of the states. I believe it violates the Constitution."Speaker D: "States rights have been very important in United States history and should be strengthened rather than weakened." The discussion of the speakers, centers on which basic principle of government in the United States?