Autocracy

Parliamentary Democracy

Presidential Democracy

Citizens directly elect members the leader, the leader is constitutionally independent of the legislature 

One person possesses unlimited power and citizens have a limited role in government.

Citizens directly elect members of Parliament, and then the members select the leader; the leader works

through the Parliament to make decisions and govern the country.

In a presidential democracy, the citizens directly elect the leader, who also serves as the head of government and head of state. The leader is independent of the legislature and is responsible for making decisions and governing the country.

Each form of government has its own advantages and disadvantages, and the effectiveness of the system often depends on the country's specific circumstances and needs.