Why did the framers of the constitution provide for a national judiciary?

The framers of the Constitution established a national judiciary to create a unified legal system that would ensure the consistent interpretation and application of Federal Laws across all states. This was essential for maintaining the rule of law, resolving disputes between states, and protecting individual rights against potential state overreach. By having a national judiciary, the framers aimed to promote stability and fairness in the legal system, fostering a sense of national identity while balancing state and federal powers.