This article discusses the phenomenon of dysfunctionality of states as a premise for the operation of terrorist organizations on their territory. It analyses historical and contemporary causes of state failure, such as the legacy of colonialism, corruption, poverty, and internal ethnic and religious conflicts. It presents various definitions and classifications of dysfunctional states, including the terms "failed state" and "fragile state." The role of terrorist organizations in such states and their ability to create alternative power structures in areas beyond the control of legitimate governments are also discussed. A key factor in the success of these organizations is radical ideology, which enables the takeover and maintenance of control in the territory of a dysfunctional state. The conclusions indicate the necessity of a comprehensive approach to the problem of state failure in the context of international security.