I mean, the "total rate of high quality decisions per year" would obviously increase in the case where we redefine 1 year to be 10 revolutions around the sun and indeed the number of wars per year would also increase. GDP per capita per year would also increase accordingly. My claim is that the situation looks much more like just literally speeding up time (while a bunch of other stuff is also happening).

Separately, I wouldn't expect population size or technology-to-date to greatly increase the rate at high large scale stratege decisions are made so my model doesn't make a very strong prediction here. (I could see an increase of several fold, but I could also imagine a decrease of several fold due to more people to coordinate. I'm not very confident about the exact change, but it would pretty surprising to me if it was as much as the per capita GDP increase which is more like 10-30x I think. E.g. consider meeting time which seems basically similar in practice throughout history.) And a change of perhaps 3x either way is overwhelmed by other variables which might effect the rate of wars so the realistic amount of evidence is tiny. (Also, there aren't that many wars, so even if there weren't possible confounders, the evidence is surely tiny due to noise.)

But, I'm claiming that the rates of cognition will increase more like 1000x which seems like a pretty different story. It's plausible to me that other variables cancel this out or make the effect go the other way, but I'm extremely skeptical about the historical data providing much evidence in the way you've suggested. (Various specific mechanistic arguments about war being less plausible as you get smarter seem plausible to me, TBC.)