"Terrorism is a very real threat, which requires robust diplomatic efforts, intelligence cooperation with allies and partners, and yes, sometimes military action. But as an organizing framework, the global war on terror has been a disaster for our country. Orienting U.S. national-security strategy around terrorism essentially allowed a few thousand violent extremists to dictate the foreign policy of the most powerful nation on earth. We responded to terrorists by giving them exactly what they wanted. The war on terror has also been staggeringly wasteful. According to the most recent study by the Costs of War Project at Brown University, it will have cost American taxpayers more than $4.9 trillion through the end of this fiscal year. Factoring in the future health-care costs of veterans injured in post-9/11 wars, the bill will be closer to $6 trillion. And even after this enormous expense, the world has more terrorists now, not fewer. According to the Center for Strategic and International Studies, there were nearly four times as many Sunni Islamic militants operating around the world in November 2018 as on September 11, 2001. That is no coincidence: the way the United States and its partners have prosecuted this war has caused widespread resentment and anger, which helps those terrorists recruit."