Answer:
A written constitution is a formal document defining the nature of the constitutional settlement, the rules that govern the political system and the rights of citizens and governments in a codified form
Explanation:
The similarity and the difference among the early state
government is that they have their own government, in addition to that, the
state has their economy to be separated among the nations in which is one of
its difficulties when it comes to trading.
The Congress of Vienna and the resulting Concert of Europe, aimed at creating a stable and peaceful Europe after the Napoleonic Wars, succeeded in creating a balance of power and peaceful diplomacy for almost a decade.