[Archbishop of Canterbury William] Laud's interference in the affairs of the Church of Ireland, aided by [King]Charles [I]'s high-handed Lord Deputy in Ireland, Thomas Wentworth, Lord Strafford, likewise angered the Irish primate, James Ussher, Archbishop of Armagh. Ussher was a rare figure as a member of an old Irish family which had become firmly Protestant, for the established Church had failed to carry more than a minority of the people of Ireland with it away from Catholicism. He is now unfairly remembered only for the misguided humanist historical precision of his calculation that God created the world on the night preceding 23 October 4004 BCE, but he was a formidable scholar who wanted to defend the independence of his Protestant Church. Ussher knew the Irish Church's weakness was the result of a badly funded and badly administered Reformation, in a country in which English colonial interference produced a state of permanent crisis, but nevertheless he saw it as a potential vehicle of proper Reformation in Ireland. He was very consciously part of an international Reformed Protestant world, but in his discreet efforts to maintain his position against Archbishop Laud, Ussher might also be seen as the first senior churchman to have a vision of episcopally governed sister Churches which might cooperate in a common identity across national boundaries, without any single leader to tell them what to do. Without knowing the later phrase, he was envisioning the worldwide Anglican Communion. (My emphasis)Christianity: The First Three Thousand Years by Diarmaid MacCulloch, p. 651.
I must say that I was pretty excited when I read the paragraph above. Archbishop Ussher was a true visionary way back in the 18th century. At present, we're still fighting the battle to resist the Archbishop of Canterbury's attempt to force the centralization of power on the churches in the communion with the Anglican Covenant.
Image from Wikipedia Commons.