Final answer:
Shays Rebellion was the main reason for wanting to strengthen the Articles of Confederation and meet in Philadelphia in 1787.
Step-by-step explanation:
The main event that led to the desire to strengthen the Articles of Confederation and meet in Philadelphia in 1787 was Shays Rebellion. Shays Rebellion was an uprising of farmers in Massachusetts who were protesting against high taxes and debt. The rebellion exposed the weaknesses of the Articles of Confederation, particularly the lack of a strong central government to maintain law and order.
Learn more about Shays Rebellion and the Articles of Confederation