When Ireland became independent, why did it abandon Northern Ireland?

The reasons can be discussed from the following angles: First, Britain far surpassed Ireland in strength

The Treaty of Britain and Ireland signed in p>1921 was a treaty based on national strength. At this time, Britain had already completed the first industrial revolution and was carrying out the second industrial revolution, mainly in Great Britain, while Ireland was still a country with agriculture and animal husbandry economy as the mainstay, with "Europe". It should be said that Britain can completely crush Ireland and win the independence of southern Ireland. For Irish people, it is already fortunate.

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Second, Britain's own national interests require it to keep Northern Ireland

Since Britain invaded Ireland in 1169, the British native people have been emigrating to Ireland, and most of them chose to live in northern Ireland. First, the dimension here is almost the same as that of Britain, and the climate is the same; Second, it is also close to Britain, making it easier to keep in touch with relatives in Britain.

By 1921, most of the land in Northern Ireland had fallen into the hands of British immigrants, and in terms of population proportion, the number of British immigrants who immigrated far exceeded that of Irish indigenous Celts. Leaving Northern Ireland in Britain is a choice made by Britain to safeguard its national core interests.

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3. Northern Ireland is the majority in Britain.

It is clearly stipulated in the Treaty of Great Britain and Ireland in p>1921 that Northern Ireland can decide whether to join Ireland or not. At that time, there were great differences in Northern Ireland on this issue. As the majority of British immigrants and their descendants (we call them the United faction) advocated staying in Britain, while the local indigenous people with a small population, mainly Celts (we call them the national faction), wanted to join Ireland. The final result is that the majority wins over the minority, and Northern Ireland remains a part of Britain. In order to take care of the feelings of the nationalists, the British government has also made some concessions, in exchange for the reconciliation of the nationalists.

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Therefore, generally speaking, it was not that Ireland gave up northern Ireland, but that the situation at that time left Ireland with no choice. If the demands were too high, it touched the core national interests of Britain and caused Britain to concentrate all its attention on dealing with the Irish uprising, I am afraid it would not be a good thing for Ireland's independence. Sometimes it would be a kind of wisdom to accept what is good. However, the Northern Ireland issue has never subsided. Until today in the 21st century, Northern Ireland independents have been fighting for independence from time to time, just like a naughty and untidy doll, which has annoyed the old mother in Britain from time to time! ! !