There are many reasons why we should remain a Crowned Republic, or as the Constitution so eloquently says, an "indissoluble Federal Commonwealth under the Crown."  ("Commonwealth"is the English word which comes Australia is one of the closest to the Latin derived word, "republic.")

Here is a list, not exhaustive, of some of the principal reasons:

1. We are one of the world’s six oldest continuing democracies.
2.  Five are constitutional monarchies, of which four have Queen Elizabeth II as their Sovereign. The other two, if you disregard their civil wars are never suggested as a model for an Australian republic: Switzerland and the USA.
3. Australians carefully considered and decided to unite in an indissoluble Federal Commonwealth under the Crown.
4. The word Commonwealth is the closest  word in English to republic;
5. Australia is a Crowned Republic; our opponents offer the alternative of a Politicians’ republic.
6. On that our opponents cannot agree; they are irreconcilably divided.
7. One group offers a republic in which the President, Vice President , Governors , Lieutenant Governors and Administrators will be, as in the 1999 model, the puppets of the politicians.
8. The other group wants to fill these 20 more elected politicians.
9.  In 1999, the Australian people nationally, in every State and in 72% of electorates rejected the  best republican model the republicans could devise at the expense of the taxpayers, with a question approved by republican and monarchist politicians.
10. Millions and millions of dollars have been diverted from such matters as schools, universities , water, etc on  six major republican projects.
11. The republicans still cannot agree on what sort of republic they are proposing.
12. The Age says that everyone knows the Flag is to be  changed under a republic.
13. Our constitutional system allowed us to evolve peacefully to full independence. At our specific request, certain vestigial links between the States and the UK remained until 1986, extinguished with The Queen personally involved in finding a solution.
14. The High Court ruled in 1907 that  The Queen or King is the Sovereign, and  the Governor – General is the  constitutional head of the Commonwealth and the Governors are the constitutional heads of state
15. Since 1926, he or she has been our international head of state.
16. The entirely separate Australian Crown is more important not for the power it weilds, but the power it denies others.
17. It is our oldest legal and constitutional institution, providing leadership beyond politics.
18. The republican movement wants to get rid of The Queen, but without The Queen there can be no Australian, Canadian or New Zealand Crown.
19. Without the Crown, the political class will occupy all positions in our Commonwealth.
20. The republicans fear they would lose another referendum. They propose an expensive plebiscite to be written by their spin doctors, which will disclose, and which was rejected by our Founding Fathers.
21. A grossly irresponsible proposal, it will invite a vote of no confidence in one of the world’s most successful constitutions.
22. If carried it would ensure years of constitutional instability with the likelihood that the people will reject any change when they see the details.
23. It is impossible to graft a politicians’ republic onto our constitutional system and to maintain the checks and balances which the Australian Crown ensures.