Our first constitution failed. It was replaced just 6 years later.
Of the 73 delegates named to the Constitutional Convention, only 39 signed the Constitution...53%.
Less than 100 years later, civil war broke out..
From the Federalist Papers, #2:
With equal pleasure I have as often taken notice that Providence has been pleased to give this one connected country to one united people--a people descended from the same ancestors, speaking the same language, professing the same religion, attached to the same principles of government, very similar in their manners and customs, and who, by their joint counsels, arms, and efforts, fighting side by side throughout a long and bloody war, have nobly established general liberty and independence.
This country and this people seem to have been made for each other, and it appears as if it was the design of Providence, that an inheritance so proper and convenient for a band of brethren, united to each other by the strongest ties, should never be split into a number of unsocial, jealous, and alien sovereignties.
If it takes Iraq 15 years to reach some point of stability, they shall have done so faster than we did...and if perchance they do choose a different path, let us know that we have acted nobly to 'establish general liberty and independence'.