Attacks from lone terrorists in the US are more severe than those who are affiliated with groups

US counterterrorism officials continue to grapple with the issue of lone actor terrorism. However, the extent to which these individuals are more dangerous than group-affiliated terrorists is unclear. In new research, Noah Turner, Steven Chermak, and Joshua Freilich investigate the severity of lone actor terrorist attacks compared to those of other terrorists. They find that lone actors do commit more severe attacks than other terrorists, particularly when both fatalities and injuries are considered.