In the soviet union, joseph stalin ran a government system that eliminated organized social groups that might challenge its authority. what is this called?

 The correct answer is :  Totalitarian

Explanation:  A totalitarian government is one that exercises control over a country in an authoritarian manner, imposing a normally unipartisan non-democratic system, where freedom depends on the dictatorship. In order for them to exercise almost absolute power over the people, they also need to handle all military power. Some totalitarian rulers were: Iósif Stalin - Union of Soviet Socialist Republics, Adolf Hitler - Nazi Germany, Chinese Communist Party - China, Benito Mussolini - Italy, Fidel and Raúl Castro - Cuba, Robert Mugabe - Zimbabwe, Augusto Pinochet - Chile.

answer; when one group has an extremely high score at pretest;