Totalitarianism is a political system in which the state holds total control over every aspect of public and private life, leaving no room for opposition or individual freedoms. Unlike other forms of governance, where political competition and individual rights are somewhat preserved, totalitarianism demands absolute loyalty and conformity. The concept of totalitarianism emerged in the early 20th century, though its roots can be traced back to ancient and medieval periods. In its modern form, it is most closely associated with dictatorial regimes that arose in the aftermath of World War I and throughout the 20th century.

The term "totalitarian" was popularized by political theorists in the 1920s and 1930s, notably in relation to regimes like those of Mussolini in Italy and Hitler in Germany. These regimes, alongside those of Stalin in the Soviet Union and others in Asia and Eastern Europe, showcased the terrifying potential of absolute political control. A hallmark of totalitarian states is the extensive centralization of power in the hands of a single leader or party. This centralization permeates every part of governance, from the military to the legal system, and extends into the social and cultural spheres, where the government seeks to dictate values, beliefs, and behaviors.

One of the key distinguishing features of totalitarianism is the suppression of political opposition. Under totalitarian rule, political pluralism is eradicated, and those who challenge the ruling authority are subject to imprisonment, torture, or execution. This is often achieved through the use of secret police, military forces, and legal systems designed to stifle dissent and maintain control. Another significant aspect is the pervasive use of propaganda to control the population's beliefs and perceptions.