The document provides an overview of totalitarian and single-party states based on an IBS study. It defines totalitarian regimes as being repressive of pluralism and individual freedoms, maintaining power through propaganda and secret police. Both Nazi Germany and Stalin's Soviet Union are presented as prime examples of totalitarian states that sought to subordinate all aspects of citizens' lives to state control. The concept of totalitarianism originated in the 20th century, enabled by new technologies to control large populations.