A Monarchy is a Government style where traditionally there is a King or Queen and blood line of ordered heirs. In a Monarchy, whoever is in power usually has absolute power over every aspect of their country. Power remains with the individual until death or if the person in power decides to relinquish power to the next heir in line to the throne. Power remains in the same blood line or dynasty.
A Direct Democracy is where the people of their respective nation all vote on everything that is passed through their government. It is common to be eligible to vote that you have to be a citizen of the country and meet certain standards(ie. white male land owners).
A Tyrannic government is where a single individual has absolute and uncontested control of all functions of a country. The Tyrant has power until death but the shift of power does not follow a blood line but goes to whoever seizes control.
Communism eliminates private ownership and the theory is that everyone is the community does equal work and receives equal pay. All of the communities produce goes through a central party the is charge of redistributing the wealth among the people.
An Anarchic government is the where there is no centralized government of a community and everything is run between person to person interactions.
Each of these government types rely on the people of the country. without the people of the country being organized and working together civilization and the progress of mankind would collapse.
Each of the governments have different ways of centralizing and distributing power. the way that the power is centered in a country ultimately decides the success of that government.