Complete rubbish. It wasn't England that hauled Ireland out of the Dark Ages, but Eire that preserved a great deal of Western philosophy and culture through the Dark Ages. You might wish to read outside your narrow sectarian bias. Dublin became important because of the Vikings, not because of the English.
gaelic cowboy is right about the institutions that existed for takeover by the Republic and the unusual relationship between Britain and Ireland that facilitated a smooth (ish) transition.
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