Helping our enemies work together Posted By Stephen M. Walt

The news that various Afghan and Pakistani insurgent groups are coordinating their activities more extensively is neither surprising nor encouraging. This outcome is exactly what balance of power theory (or if you prefer, balance of threat theory) would predict: as the United States increases its military presence and escalates the level of violence, its various opponents put aside their differences for the moment in order to deal with the more imminent danger.More at:
http://walt.foreignpolicy.com/posts/2010/12/29/helping_our_enemies_work_together