An extensive study done by the Pew Research Center has yielded some fascinating information regarding the trajectory of world religions over the next four decades.
As of 2010, Christianity was the dominant world religion with roughly 2.2 billion adherents and Muslims were second with about 1.6 billion adherents. If current demographic trends continue however, Islam is expected to catch up to Christianity midway through the 21st century.
Please read the article, then come back here for a discussion.
The take-away is: “The religiously unaffiliated (atheists, agnostics) are expected to see the largest net gains from switching, adding more than 61 million followers.”
Why are churches loosing members to faithlessness?