Is it "inevitable" that Australia become a republic on the death of the present Queen?
Well, it is certainly inevitable that, if Australia, New Zealand, Canada and the Commonwealth Realms in the West Indies do become republics, then the argument that the monarchy in Britain embodies ties shared by millions of families here will no longer apply.
What matters more, in any of our countries? Those ties? Or strictly elite preferences for Chianitishire or Cape Cod?
If any country might be on the brink of cutting those ties unless male primogeniture be abolished, or the Act of Settlement repealed, then that is a good enough reason for such abolition or repeal. But nothing else is.