Florida was returned to Spain after the American Revolution.
The large presence of African slaves.
I think because no other country in the world has created something interesting or it was just a pass down by their ancestors and they wanted it to be a thing
It is the "National Labor Relations Board" that acts as a mediator in disputes between unions and employers, since many people on both sides of the dispute often claim that the other side is acting unjustly, especially when it comes to negotiations.