ISIS attacks abroad and a series of deadly right-wing attacks in the U.S. have fueled a demand for more information on extremist networks. Understanding them is the first step in fighting them. But there has been little discussion about potential harm to the researchers tasked with looking deep inside the world’s most dangerous movements.

ISIS attacks abroad and a series of deadly right-wing attacks in the U.S. have fueled a demand for more information on extremist networks. Understanding them is the first step in fighting them. But there has been little discussion about potential harm to the researchers tasked with looking deep inside the world’s most dangerous movements.