Most one-party systems are associated with fascism. Fascism is a political system in which a dictator has complete power. Some related words are absolutism, authoritarianism and totalitarianism.
The term fascism was originally used to describe the political program of Benito Mussolini in Italy in the early 20th century. It is now used to refer to political systems that are built around a single, central authority, where the central government has complete control of the general populace.
In modern times, fascism is seen in government systems that repress criticisms and opinions that contradict the public image the government wishes to display. In a fascist system, control is exerted over industry and trade, and there is a strong tendency to develop racism toward other cultures.