When people kings and queen have little to no say with what happens in the government. Normally throne is inherited from generations of the family be royalty. A form of this is... Prince William and Princess Kate and their children, Queen Elizabeth.This kind of government was very very common somewhere around 200 years ago, and there is some country's that still have it.
This is when one person runs the country and has total power, this could be a king or queen but it doesn't have to be. Examples of country's with dictators is North Korea , Cuba, and Libya. North Korea is run by Kim Jung-Un. Most people in a dictatorship don't inherit the power they seize it and use there power over their people. It could be a bad or good thing, but most of the time it is a bad thing, because violate might be encouraged.