Ask a Bible Teacher
http://www.gracethrufaith.com/ask-a-bible-teacher/one-world-government
A. The fact that there will be a one world government under the control of the anti-Christ is a widely accepted theory among prophecy scholars. And it's no secret that groups like the ones you mention have been working toward that same end for some time. Whether they will succeed or whether some other form of world government will take shape is still unknown.
The direction the world is currently headed makes it just as likely that there'll be a world wide Islamic Caliphate, as Moslem prophecy suggests.