I fair to understand how the existence of a constitutional monarchy would prevent dictatorship. Granted, it is unlikely that in that case the king or queen will become a dictator, having been shunted out of real power by the constitutional monarchy constitution. But if we take it as true that most or even many dictators come to power by force, I don't see any less potential for that to happen in such a country.

Indeed, come to think of it, I believe that both Spain and Italy were constitutional monarchies when they came under Franco and Mussolini respectively.

Dave Oesterreich