Who is the fater of the constitution?

James Madison he was the principal author

http://en.wikipedia.org/wiki/James_Madison

The father of the United States Constitution is James Madison. He played a significant role in the drafting and ratification of the Constitution. To find the answer to this question, you can use various methods:

1. Historical Sources: Consult primary sources like historical documents, books, or records that discuss the creation of the Constitution and the individuals involved.

2. Reliable Reference Materials: Check reputable reference materials such as history textbooks, encyclopedias, or academic websites that provide accurate information about the Constitution and its framers.

3. Online Search: Conduct an online search using search engines to find reliable sources that discuss the creation of the Constitution and the influential figures involved.

Keep in mind that always cross-referencing multiple sources can help ensure the accuracy and reliability of the information you find.