Editor's Note: What if most terrorism isn’t really terrorism? In past decades, much of what we call terrorism today would have been seen as insurgent violence, revolutionary war, or civil war: a group like the Islamic State, which uses tanks as well as suicide bombing, is a prime example of an organization that is wrongly classified as a terrorist group. John Mueller of Ohio State University and Mark Stewart of the University of Newcastle in Australia unpack this definitional confusion and argue that it leads to a gross misunderstanding of the true threat we face.
