>>28847283I don't know much about the scientific advancements during that Era anyway (I prefer the version of the dark ages where magic is real and shit, then just suddenly disappeared when gunpowder started being widely used), but it would have made it show a sizable increase, rather than staying stagnant (or a ridiculously slow increase if anything).
A more correct form of the graph wouldn't show a decline, but it would show the rate of increase being massively stunted, if not halted entirely, and be labeled so that it applies to europe.