Answer:
A civil war between neighboring tribes
In the U.S., There are some powers delegated to the government only, and others that are reserved to the states. However, there are powers that both the government and the states have and can exercise simultaneously within the U.S. territory, these are called concurrent powers. The areas in which the federal govenrment and the states have concurrent power include in the power to tax, make roads, protect the environment, establish bankruptcy laws, create lower courts and regulate elections, among others.
It depends. The true definition, with is roughly law without force, then it wouldn't be too bad. Sounds like it would just be a non corrupt world. However, modern day groups like ANTIFA, it would suck. Things have been blown out of proportion honestly to the point where anarchy, or "anti-fascism", almost looks like fascism.
China had 5000 years of Chinese history