They say the average empire lasts 250 years, and the United States is 245 years old. So, if the United States isn’t the exception to the rule. We should start planning new hypothetical nations.
Government type: Elective Monarchism or Diarchic Republic
Economic system: Bismarckian-Roosevelt economics
Territories: Maine, New Hampshire, Massachusetts, Vermont, Connecticut, Rhode island, New York, Pennsylvania, Ohio, and Michigan.
Capital: Saratoga springs or Boston
The New England Federation would strengthen ties with the existing monarchies. United Kingdom, Oman, Thailand, and so on. It’d also build up a relationship with Russia.
State religion: Up for debate
Recognized religions: Paganism, Catholicism, and Islam, and Judaism