England is a country that has been incorporated into an artificial conglomerate along with the countries of Scotland and Whales. These artificial constructs tend to come apart anywhere in the timespan of a few decades to one or two centuries. In fact, the secession movement in Scotland is gaining more ground recently than ever before. And similarly, there are now some new countries to appear as well as among many others the California Republic and the Texas Republic secede from the United States
Hilarious. The artificial construct that you expect to come apart in two centuries at most was established by the Act of Union in 1707 when the UK was formed. Wales and England were joined into one kingdom starting back in 1535. We've had an odd period of dissolving nations, mostly in Europe, since the end of the Cold War, but notice that Quebec rejected independence in two plebiscites already and Scotland is likely to reject independence in its own plebiscite, according to all the polls.
I suppose we can solve the problems with Iran by waiting for the Medes and the Persians to split into two nations? No? Surely they're overdue by now, having been united in 550 BC. Don't hold your breath, though, because one man's Mede is another man's Persian these days.