With a POD after January 1, 1900 is it possible for the world by the year 2018 to have no monarchies? And if so how can this be done?
Just as Italy got rid of the monarchy in 1946 because it was tainted by its association with Mussolini, if the other countries that were occupied by Nazi had their own monarchs stayed instead of going in exile and were completely co-operative with the Nazis, then after the liberation of Europe they would have been disposed.
As for Great Britain, if King Edward VIII did not marry Wallis and thus did not have to abdicate, his potential conduct and his perceived sympathy for the Nazis would probably have led the Labour Government in 1945 to proclaim a republic.
As for Spain after the death of Franco if the public objected to Juan Carlos his hand picked successor then he would not have accepted the throne.
Japan would have to abolish the monarchy as a part of the demands the Allies made for unconditional surrender and Hirohito would be a defendant in the Tokyo War Crimes Trials.
As for other countries that have monarchies, things like the people objecting to the expense of the care and feeding of them, no longer being relevant to their own lives.
Not that many I think, it just that if you turned the question around and asked how to keep the monarchy going, you would basically state the opposite.Too many PODs...
There is not way how you abolish all monarchies by 2018 with 1900 POD. You would need many things that you can abolish monarchy. And if you count pope as monarch, it would be impossible abolish papacy. In some countries monarchy is soo established with a nation that abolishment is impossible or very difrficult. Even Americans couldn't do that after WW2.
Commie world wide revolution succeeds is what it would take.