Some countries that have oligarchy governments include China, North Korea and Venezuela. The former Soviet Union was also considered to be an oligarchy. An oligarchy is a kind of government in which either a few people or a dominant group has all the power.
Other types of government include monarchy, democracy and authoritarianism. A monarchy is a government where a single family is in power from generation to generation. Monarchies were the most common type of government until the 19th century. A democracy is a government in which the people have power and the right to participate in government decisions. The United States is a representative democracy in which people voice their opinions through elected representatives. Authoritarianism is a type of government where the people have no voice in government decisions. Cuba has a government based on authoritarianism.