Was the switch from the Articles of Confederation to the Constitution necessary?
Yes, because the United States under the Articles of Confederation operated as a loose group of individual states, which retained most of their sovereign status. States would be able to interfere with one another with no power over them to make them act as equals. In addition, the federal government had little authority to act as a government with foreign nations. The Articles simply did not establish a unified government. IF the switch had not been made to a government with a stronger federal system, the likelihood is that the individual states would have gone their own ways as they eventually tried to do before the Civil War.