Why is james madison known as the father of the constitution

James Madison is known as one of the greatest father of the constitution because of his crucial and vital contributions in this field.

Following are his contributions-

1. He has given and made a contribution in 10 amendment bill of right.

2. In the 1780s, Madison even advocated for the reforms of Articles of Confederation.

3.In 1785 Madison helped in arrangement of " Mount Vernon Conference", which settled the disputes over the navigation rights on the River of Potomac and also became a  model for future interstate conferences.

4. During the time of Rectification debates, he even wrote so many impactful essays.  

In the formation of Constitution, many of type people had made contributions but without james Madison Constitution could not be formed.

because there are alot of mountains