Why was the Constitutional Convention called?

Help plzzz

The Constitutional Convention took place from May 14 to September 17, 1787, in Philadelphia, Pennsylvania. The point of the event was decide how America was going to be governed. Although the Convention had been officially called to revise the existing Articles of Confederation, many delegates had much bigger plans.

500 books can be produced by one man and a printing press within 5 months, while a copyist can only produce one in the same amount of time

must repent and believe in god.

or the book

journey across time - chapter 10 "the rise of christianity"