What is an authoritarian government?

An Autocratic Government is when there is one ruler, e.g. in Russia from the 1600's-1917 there was on tsar (emperor) who is all powerful over the country. There is no way for changing an autocratic rulers mind because they believe they are there on God's will. Below the ruler there would be a small contingency of a government and then the rest would have no power whatsoever. there would be no vote because political parties are illegal.