A "constitutional monarchy" is a government in which the monarch is a figurehead. He or she performs ceremonial functions, such as state visits and ship christenings. There is a parliament and a prime minister. The parliament is responsible for making the laws and the prime minister executes the law.
In a "true monarchy," the monarch's word is law because the monarch is the state. The Monarch is the equivalent of the President, Congress, and the Supreme Court all rolled into one.
Yet some people still think that one particular family inheriting titles is somehow special. It isn't u freaks!
All heads of state and members of any house of parliament must be elected!
Absolute Monarchy is where the King or Queen has absolute power and can do what he wants.
Constituitonal monarchy is when the King shares power with Parliament and must follow the rules of the constituition.
Originally, thousands of years ago, monarchy was so that one guy could control all and everyone would know who succeeded him. This way, there were no fights between people over things like laws or taxes because only one person decided that, and no fights over who would succeed him because it was his child. Unfortunately in many cases (I won't say most because that is an opinion) the ruler wasn't suited for the job and there were fights anyway. Because of this many countries either changed to Democracy or changed to Constitutional Monarchy.
Constitutional Monarchy: The current government of England.