The term that best explains the power held by the Soviet government that was led by the dictator Joseph Stalin is "totalitarianism."
Totalitarianism is a form of government in which a single person or group holds absolute power and control over all aspects of society, including the economy, media, education, and individual lives. Totalitarian regimes often use propaganda, censorship, and repression to maintain their power and suppress opposition.
Under Stalin's rule, the Soviet government was a totalitarian regime that sought to control every aspect of Soviet society. Stalin's government suppressed political opposition, censored the media, and used propaganda to shape public opinion. Stalin also implemented policies such as collectivization and industrialization that had significant impacts on the economy and society.
Overall, Stalin's Soviet government was a prime example of a totalitarian regime, with the dictator holding absolute power and control over all aspects of Soviet life.