Kilcullen

"Killing or capturing terrorists is a strictly secondary activity, because it is ultimately defensive (keeping today's terrorists at bay) rather than decisive (preventing future terrorism).  Conversely, programs that address the underlying conditions that terrorists exploit (thus preventing another crop of terrorists from simply replacing those we kill or capture today) are ultimately decisive.  Clearly, like any military or law enforcement strategy, countering AQ requires both the kill/capture of current terrorists and programs to counter their ideology and address the underlying conditions they exploit."
-David Kilcullen, The Accidental Guerrilla