The secret of its success was the ultra-open border it created between the British-ruled province and the Irish republic.
Catholic “nationalists” dreaming of a united Ireland could live their lives as if it were true, and even claim Irish passports. Protestant “loyalists” could still fly the Union Jack and pretend that nothing important had changed.
Unfortunately, this agreeable compromise depended critically on the invisibility of the “virtual” border, so when Brexit came along in 2016 the whole deal was undermined.
With nationalism resurgent everywhere and the British empire gone, an outbreak of English nationalism was quite likely, and the obvious target for it was the European Union. An ambitious journalist named Boris Johnson put himself at the head of the Brexit (“British exit” from the EU) cause, hoping it would make him prime minister — and lo! In 2019, it did.
Johnson neither knew nor cared about Irish politics and diplomacy, but some kind of real border with the Republic of Ireland had to reappear if the UK left the EU. He denied this fact as long as he could, but in 2019 he signed a “withdrawal agreement” that put the UK-EU border in the Irish Sea, between Northern Ireland and the rest of the UK.
This infuriated the Northern Irish “loyalists”, who believed they were becoming second-class British citizens. It hugely encouraged the more militant “nationalists” among the Catholic population, who imagined that it was the last step before the inevitable unification of all Ireland.
So the ancient conflict began to reawaken.
Johnson, having lied about the meaning of the treaty with the EU for two years, then threatened to tear it up, but his own Conservative Party dumped him last July over his incessant lying.
In February, new prime minister Rishi Sunak negotiated a deal with the EU that eases the movement of goods between Northern Ireland and the rest of the UK, but leaves the border in the Irish Sea. Maybe that will lull the monster back to sleep — and maybe not.
There is still no democratically elected government in Northern Ireland, because the biggest “loyalist” party is boycotting the assembly until the border in the Irish Sea is removed. But put it back on land, and the “nationalists” will revolt.
Many good people are striving to head off a collapse of the agreement, and they will probably succeed. But it’s hardly surprising that Joe Biden, of Irish Catholic descent, is starting his Irish visit in Belfast, in Northern Ireland — and that he is not planning to attend the coronation of King Charles III in London next month.