This is from J.H. Newman's Anglican Difficulties.
"They did not understand that the Established Religion [i.e. the Church of England] was set up in Erastianism, that Erastianism was its essence, and that to destroy Erastianism was to destroy the religion."What think ye of this conclusion? Is the crumbling of the Anglican Communion merely the result of the evaporation of the British Empire which sustained it?
Newman's words are directly to Anglo-Catholics in England. One of his chief charges against Anglo-Catholicism is that the Movement of 1833 was a movement against the Erastian model of ecclesiology. You might remember that Keble and the Tractarians were originally alarmed by the State's dissolution bishoprics in Ireland. Newman believes that the only true fulfillment of Keble's 1833 Assize sermon is to utterly reject Erastianism altogether. If the Anglo-Catholic rejects Erastianism, he must either allow Anglo-Catholicism become a Protestant sect (like Methodism) or he must join the Roman Church.
It seems that the Erastian prop (aka the British Empire) of the Global Anglicanism has fallen away. Is this why Global Anglicanism is crumbling?