“Social media has empowered isis recruiting, helping the group draw at least 30,000 foreign fighters, from some 100 countries, to the battlefields of Syria and Iraq. It has aided the seeding of new franchises in places ranging from Libya and Afghanistan to Nigeria and Bangladesh. It was the vehicle isis used to declare war on the United States: The execution of the American journalist James Foley was deliberately choreographed for viral distribution. And it is how the group has inspired acts of terror on five continents.”
Source: How Twitter Is Changing Modern Warfare – The Atlantic