In 1767 smallpox struck the House of Austria, killing Maria-Theresa's daughter Maria-Josefa about to leave to become Queen of Naples, daughter in law Maria-Isabella of Parma Queen of the Romans and scarring Archduchess Maria-Elisabeth. Thus her Heir became a widower and she was down two daughters for the marriage market. Had this not happened Maria-Josepha could have become Queen of Naples, Joseph still in a loving marriage might have left heirs and Maria-Carolina (Louis XV's god daughter) would have been the prime candidate to become Louis XVI's Queen since she would not be needed in Naples. Maria-Carolina was forceful, an anglophile, highly sexed, highly fertile and highly intelligent. Could Maria-Carolina have guided the weak Louis XVI through the French Revolution and brought France safely toward a stable Constitutional Monarchy?