Jack LevinJack Levin is the Brudnick Professor Emeritus in the Department of Sociology at Northeastern University, where he co-directs its Center on Violence and Conflict. He has authored or co-authored more than 30 books, most recently Extreme Killing: Undestanding Serial and Mass Murder, The Will to Kill: Making Sense of Senseless Murder, and The Violence of Hate: Understanding Harmful Forms of Bias and Bigotry. Read More Read Less