Is there one true religion or is religion man made?

Paper details:

The paper needs to prove if possible if religion is real or man made. Right now I believe that there is a god and I choose this topic to find out if what I believe is all man made. 1500 words https://www.youtube.com/watch?v=ql2yz7XDs2A I found that video interesting however I have had a lot of trouble finding other information. Also needs a work cited page.