I believe you mean Theocracy - that is a government system that recognizes a deity as the supreme ruler, or sometimes by a group of individuals who are thought to have a direct line of communication with a deity.
Iran and Vatican City are theocracies.
The Etruscan government style changed from total monarchy to oligarchic democracy (as the Roman Republic) in the 6th century BC.
Although many countries in the Middle East appear to be theocracies because of their sharia laws (from the Qur'an), the only real theocracy is Saudi Arabia where Islam is the onlyreligion.
The squeakiest wheel gets the oil. We strive to keep Seperation of Church and State as law. If suddenly tomorrow your government said you country was governed by God and the Church you could be exiled, punished, or murdered for not believing the way they say to believe. I guarantee you if the USA became a theoracy, people would die or disappear.