Answer:
The system of dual/joint federalism in the United States is a product of the backlash against the Articles of Confederation, ratified in 1781, which established a very weak federal government with the powers to declare war, make treaties, and maintain an army.Fueled by Shays' Rebellion and an economy faltering under the inability of the federal government to pay the debt from the American Revolution, a group later known as the Federalists generated support for a strong central government and called for a Constitutional Convention in 1787 to reconsider the Articles.
Step-by-step explanation: