Provides information about "the history, philosophy, and motivations driving 150 extremist organizations." Each entry contains:

Overview:

Provides a brief overview of the subject of the entry.

History:

Provides the background and history of the group, including its origins and the individuals associated with the development and organization of the group.

Philosophy and Tactics:

Provides an overview of the philosophy of the group and how that philosophy is implemented by the group to bring about change.

Other Perspectives:

Provides an overview of reactions to the group by governments, individuals, or other groups.

Summary:

Provides a brief summary of the groups' leaders, governing philosophy, and actions.

Sources:

Provides a list of sources consulted or cited within the entry.

Part of the Gale Virtual Reference Library