The easiest answer to the question of who wrote the Constitution is James Madison, who drafted the document after the Constitutional Convention of 1787.

Who actually wrote the Constitution of the United States?

James Madison is known as the Father of the Constitution because of his pivotal role in the document's drafting as well as its ratification. Madison also drafted the first 10 amendments -- the Bill of Rights.

How many Founding Fathers wrote the Constitution?

Of the 55 Framers, only 39 were signers of the Constitution.