Salaam,
the answer is not in impositions, as a constitution creates, it does not matter you intend the best, it is not the place of one man to impose upon another.
The natural law is the answer, it is universal, inalienable, immutable and can be used in any system to protect you, once you understand it.
The basis of the natural law of the land is a law can only protect it can NEVER impose, if a law does not protect me from encroachment, it does not apply to me.
The systems we suffer world wide at present are systems of imposition, the Qur'an says, their is no compulsion, in other words you cannot force another to comply to your dictates, whether you call yourself a King, prime minister or president, the truth is to invent upon the law makes what is against the law, lawful, which is the very definition of legislation, they legislate what is unlawful into law, however they require your consent to apply that invented law upon you, which they gain through presumptions of law, which you are required to rebut, if you don't they presume you agree to the unlawful invention of law, or legislation, that is why what is legal is in opposition to what is lawful.
That may seem hard to follow; but the answer is in the law, not in adding another layer of rules, regulations and legislations, encroaching into the lives of others, for which you have no business doing, I have written a contract of community, which is what the Qur'an directs, not a constitution of imposition, but simply the natural law explained in the form of a lawful contract, with the systems of business that understanding demands included.
I have also written a Affidavit of Allodium Claim, which reclaims the lawful use of the land held in corporation, it is time the accumulated wealth were stopped from existing as parasites upon the poor, and the true models of Islam provide that.
If you put as much energy into establishing the real models of Islam, as you have in writing the constitution we may begin to see Islam returning to the world.
