So I've been reading that the first modern income taxes in France didn't occur until 1872. This I found interesting given the history of France's financial history and I can't help but wonder, what the impact would be if modern progressive income taxes were levied much earlier, either through during the Revolution or during the Ancien Regime.
And of course, if such a thing is plausible. Would other states quickly follow the French Model? If so, what happens then?