Terrorism and ideologically inspired violence are persistent and serious threats to U.S. national security. This report uses interviews to explore why and how 32 individuals joined extremist organizations and how some of them exited these groups.

In the country’s changing threat environment, homegrown violent extremism (HVE) represents the next challenge in counterterrorism. Security and public policy expert Erroll Southers examines post-9/11 HVE – what it is, the conditions enabling its existence, and the community-based approaches that can reduce the risk of homegrown terrorism. Drawing on scholarly insight and more than three decades on the front lines of America’s security efforts, Southers challenges the misplaced counterterrorism focus on foreign individuals and communities. As Southers shows, there is no true profile of a terrorist. The book challenges how Americans think about terrorism, recruitment, and the homegrown threat. It contains essential information for communities, security practitioners, and policymakers on how violent extremists exploit vulnerabilities in their communities and offers approaches to put security theory into practice.

Using existing fbi data and ethnographic data, this edition compares and contrasts domestic sources of terrorism in the united states to those in other countries, while also discussing efforts by domestic terrorists to form alliances with foreign groups.

In an unsettling time in American history, the outbreak of right-wing violence is among the most disturbing developments. In recent years, attacks originating from the far right of American politics have targeted religious and ethnic minorities, with a series of antigovernment militants, religious extremists, and lone-wolf mass shooters inspired by right-wing ideologies. The need to understand the nature and danger of far-right violence is greater than ever. In American Zealots, Arie Perliger provides a wide-ranging and rigorously researched overview of right-wing domestic terrorism. He analyzes its historical roots, characteristics, tactics, rhetoric, and organization, assessing the current and future trajectory of the use of violence by the far right. Perliger draws on a comprehensive dataset of more than 5,000 attacks and their perpetrators from 1990 through 2017 in order to explore key trends in American right-wing terrorism. He describes the entire ideological spectrum of the American far right, including today’s white supremacists, antigovernment groups, and antiabortion fundamentalists, as well as the histories of the KKK, skinheads, and neo-Nazis. Based on these findings, Perliger suggests counterterrorism policies that can respond effectively to the far-right threat. A groundbreaking examination of violence spawned from right-wing ideologies, American Zealots is essential reading for everyone seeking to understand the transformation of domestic terrorism.

Although the terrorist attacks of 11 September 2001 shocked the world, America has confronted terrorism at home for well over a century. With the invention of dynamite in 1866, Americans began to worry about anonymous acts of mass violence in a way that differed from previous generations' fears of urban riots, slave uprisings, and mob violence. Focusing on the volatile period between the 1886 Haymarket bombing and the 1920 bombing outside J. P. Morgan's Wall Street office, Jeffory Clymer argues that economic and cultural displacements caused by the expansion of industrial capitalism directly influenced evolving ideas about terrorism. In America's Culture of Terrorism, Clymer uncovers the roots of American terrorism and its impact on American identity by exploring the literary works of Henry James, Ida B. Wells, Jack London, Thomas Dixon, and Covington Hall, as well as trial transcripts, media reports, and the cultural rhetoric surrounding terrorist acts of the day. He demonstrates that the rise of mass media and the pressures of the industrial wage-labor economy both fueled the development of terrorism and shaped society's response to it. His analysis not only sheds new light on American literature and culture a century ago but also offers insights into the contemporary understanding of terrorism.

Countering violent extremism consists of various prevention and intervention approaches to increase the resilience of communities and individuals to radicalization toward violent extremism, to provide nonviolent avenues for expressing grievances, and to educate communities about the threat of recruitment and radicalization to violence. To explore the application of health approaches in community-level strategies to countering violent extremism and radicalization, the National Academies of Sciences, Engineering, and Medicine held a public workshop in September 2016. Participants explored the evolving threat of violent extremism and radicalization within communities across America, traditional versus health-centered approaches to countering violent extremism and radicalization, and opportunities for cross-sector and interdisciplinary collaboration and learning among domestic and international stakeholders and organizations. This publication summarizes the presentations and discussions from the workshop.