What was a major obstacle to drafting a new constitution at the constitutional convention of 1787

A major obstacle to drafting the new constitution at the Constitutional Convention of 1787 was that the Anti-Federalist believed it would make the central government too powerful over the states, so they pressed for revisions (such as the Bill of Rights) that would ensure that this did not happen.

Explanation:

the name of the theory is landmass theory.

1775 is your answer hope this