University College London's Dr Paul Gill has done an extensive amount of research in the area of lone actor terrorism, including the role of mental health, and wrote the first book using empirical analysis to understand the lone-actor terrorist profile. Based upon a unique data set of 111 lone actors, it looked at questions like: Is there a lone-actor terrorist profile? What role, if any, does the internet play? What role, if any, does mental illness play? and how can the future threat be minimized ?
Dr Gill has also worked with the US Department of Homeland Security and argues the 'lone wolf' moniker is misleading and often counterproductive. He is also involved with the Grievance Project which seeks to make significant advances in increasing our understanding, and thereby reducing the risk, of extremist violence.