Many countries, states and organisations do not belong to a federation or union.
It is not an essential part of governance or management.
However, the answers to such "what if", type questions have to be opinions and therefore it would depend on who you ask.
You have it backwards. The US government is set up so that the states and people have the power, and by the Constitution they only let the Federal government do a few things like raise an army to protect all of the States, regulate business between and among the States, and so forth.
The Federal government in actuality has taken as much power as it wants, and we, the States and people, have let them do it. Too bad. People who want the correct government back are forming groups like the Tea Party, to do it.
This was tried in the Articles of Confederation and it didn't work. The problem with this is that the federal government does a number of things for the people and the states. Mail delivery, money, trade, and taxes are all under the federal government. When the Articles were in effect each state printed its own money. This didn't work very well. Some states charged a fee to cross the border, while others restricted what could be traded. There has to be a unified system of laws for everyone otherwise there would be discrimination and an unbalance in how the law is seen and used.
Chaos would ensue
Each state has it's own set of intestacy laws which govern how property is passed in the event a person dies without a will. Part of these laws govern the chain of relatives that the property would follow until a suitable heir was found.
there will be crisis every where; cause there will be no rule to govern the people
when did it happen
Federal War happened on 1859-01-20.
Federal Election Campaign Act happened in 1971.
If there is a conflict between state law in road island and federal law what would happen
Next German federal election happened on 2013-10-27.
Next Australian federal election happened on 2013-11-30.
could cellular respiration happen without photosynthesis explain your reasoning
They first rejected the authority of the Parliament of Great Britain.
You will be penalized by the law enforcing police authority by your being caught without insurance of your car while driving on public road. Your car can be confiscated if you fail to pay the spot the find and summoned to the nearest police station for initiating case against you.