Survivalism is a movement of individuals or groups (called survivalists or preppers) who are actively preparing for emergencies, including possible disruptions in social or political order, on scales from local to international. The words prepper and are derived from the word . Survivalists often acquire emergency medical and self-defense training, stockpile food and water, prepare to become self-sufficient, and build structures (e.g., a survival retreat or an underground shelter) that may help them survive a catastrophe.
The term survivalist dates to 1976. The term prepper has grown in popularity after the 1990s, partly as a reaction to terrorists like Ted Kaczynski and Timothy McVeigh and stereotypes connected with them.
The origins of the modern Survivalist movement in the United Kingdom and the United States include government policies, threats of nuclear warfare, religious beliefs, and writers who warned of social or economic collapse in both non-fiction and apocalyptic and post-apocalyptic fiction.
The Cold War era civil defense programs promoted public atomic bomb shelters, personal fallout shelters, and training for children, such as the Duck and Cover films. The Church of Jesus Christ of Latter-day Saints (LDS Church) long directed its members to store a year's worth of food for themselves and their families in preparation for such possibilities; but the current teaching advises only a three-month supply.
The Great Depression that followed the Wall Street Crash of 1929 is cited by survivalists as an example of the need to be prepared.