"Doomsday theories" refers to theories or predictions about an event that will cause the end of the world or the destruction of civilization. Full definition
The last thing we need is to replace doomsday theories with conspiracy theories. (religion.blogs.cnn.com)
I have no reason to believe their judgment selecting candidates for office or voting on referenda is any better than their judgment evaluating doomsday theories. (religion.blogs.cnn.com)
Plus: Legal Sports Report refutes imminent doomsday theories for daily fantasy sports industry. (bettingtalk.com)