Anthology of diverse viewpoints exploring extremists on both the right and the left, how domestic extremism has evolved since the advent of the internet and social media, and how law enforcement at various levels should address it, particularly in the prevention of extremist attacks. Provided by publisher

Do political parties encourage extremism in the US? -- Is political extremism a significant cause of terrorism and violent crime in the US? -- Does the contemporary media environment in America encourage political extremism? -- Organizations to contact.