If a monarchy it should be a constitutional monarchy so that the monarch is pretty hemmed in with a good constitution. If a republic the same is
required a strong constitution with good checks and balances. All of the pros and cons of this were discussed over 200 years ago by the founders of
the USA. A read through the
Federalist Papers is a good way to absorb this body of
knowledge if your English is pretty good and yours seems to be.
[edit on 9/3/2008 by UFOTECH]