Final answer:
The Philadelphia Convention of 1787 initially aimed to revise the Articles of Confederation but evolved into crafting the U.S. Constitution.
Step-by-step explanation:
The initial purpose for calling the Philadelphia Convention of 1787 was to revise the Articles of Confederation. This intent is indicated as true by historical records including notes by James Madison and endorsements by the Confederation Congress. Nevertheless, the convention soon transitioned into establishing a new framework for the United States, culminating in the creation of the U.S. Constitution. Delegates faced the challenge of balancing the desire for a stronger national government with the preservation of state autonomy and individual rights.