What was the main reason the Articles of Confederation were replaced by the U.S. Constitution?

The main reason the Articles of Confederation were replaced by the U.S. Constitution was to expand the powers of the national government. Under the Articles of Confederation, the federal government was significantly limited in its authority, lacking the power to tax, regulate interstate commerce, or maintain a standing army. This lack of power made it difficult for the national government to respond effectively to issues such as economic instability and internal unrest, exemplified by events like Shays' Rebellion.

The framers of the Constitution aimed to create a stronger central government capable of addressing these challenges and maintaining order. By providing the federal government with increased authority, the Constitution established a framework that allowed for a more cohesive and stable union. This shift was essential for promoting national interests and ensuring that the government could effectively manage and unify the diverse states under its jurisdiction.