:Very respectfully, the evidence doesn't support that: 
 :*Syria - a loose aglomeration of rebels (a militia) has been fighting to overthrow their government. 
 :*In Lybia - a loose agglomeration of rebels (a militia) overthrew their government. 
 :*In Egypt - civil disobedience has led to violence (a militia type action) rejecting their government. 
 Certainly the so called militia movement in the United States has come to the forefront of media thought in the last 20 to 30 years but the existence of militias has existed throughout the history of the United States and before without much fanfare.  Citizens colonizing the west formed militia quite regularly to repel indian invasions, outlaws from taking over their towns, etc.  It's quite common, it's just that nobody writes a story everytime a group of citizens gets together to form a militia - that doesn't mean they weren't there. -