Will the United States remain a united country forever?

Forever is a very long time, so no, it won't remain united forever. Perhaps when the dinosaurs make a comeback or when the human race is wiped out by aliens/sickness/an asteroid/a biblical event. But the likelihood is good that no-one alive today(*) will see the USA splitting into multiple countries. read more

The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions. read more