To save myself work, and keep Andalusada canny, I'm allowing myself a rolling century of grace. There can be some small changes to what's going on anywhere beforehand, but that doesn't count for a hell of a lot - but after the ripples of that one stone in the stream of history impact into the history of a given area, there's a one-century countdown before anybody recognizable stops being born. And even within that timeframe, their lives and careers will be increasingly impacted by the drift of the world.
I realize that this is kinda vague, so I'm going to demonstrate what I mean by this with a rather important example. But before I do that, I'd to take a moment and ask the forgiveness of God.
Because I'm going to grimdark Saint Francis of fucking Assisi.