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What if, in an act of good foresight, Louis XIV stubbornly decides against issuing the Edict of Fontainebleau? I foresee a few sets of consequences because of this:
First of all, the huge amount of skilled Huguenots would not leave France, meaning that the nation would be overall richer and more powerful in its upcoming wars.
Protestant nations would have less reason to be angry at Louis XIV, meaning perhaps less adversaries in France's future wars or adversaries who lack the intense drive of religious warfare.
Because the Edict of Fontainebleau is not proclaimed, the Brandenburg-Prussia edict, Edict of Potsdam is not issued. This means that there is no mass European migration to the nation, and if one would want to stretch it far enough, there could be no emergence of the Prussian nation which would help unify Germany further down in history.
A stronger, richer France with a much larger population (between 200,000 and 900,000 Protestants have been said to have left the country) would be able to fare much better in the War of the Spanish Succession. In fact, they may fare so much better that they actually continue to impose their original plan of making Philip V of Spain have rights to the French Crown. This means that upon Louis XIV's death you could possibly see a unified Franco-Spain, which would have tremendous influence in the west. France's additional power would also help in controlling the weakening Spanish Empire, meaning an overall more dangerous foe in the west for Protestantism.
On a less likely note, the continuation of religious tolerance may help to inspire the ideas of liberalism (separation of church and state, republics/democracies, etc.) earlier.
Does anyone see any flaws in this or have any additional after-effects?