How pervasive is extremism in the Muslim world?

How pervasive is extremism among the World's Muslims? It's worth making a distinction between Extreme Acts carried out by a tiny minority of radicals and extreme beliefs subscribed to by 100's of million of Muslims worldwide. Also, Ben Affleck drops by to offer his opinion.

Pew Research Report: http://www.pewforum.org/2013/04/30/the-worlds-muslims-religion-politics-society-overview/
Real Time with Bill Maher: Ben Affleck, Sam Harris and Bill Maher Debate Radical Islam: https://www.youtube.com/watch?v=vln9D81eO60
Country by country population statistics: https://www.cia.gov/library/publications/the-world-factbook/

About The Author
-