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  A region in flames
      Among today′s geopolitical risks, none is greater than the long arc of instability stretching from the Maghreb to the Afghanistan-Pakistan border. With the Arab Spring an increasingly distant memory, the instability along this arc is deepening. An analysis by Nouriel Roubini 
  
  
      
  
                  By
          
                
                        
                    
               Nouriel Roubini