Here's a source other than Wikipedia that disagrees with your conclusion about a big decline in wealth generation (and other points as well):
It does no such thing. You are failing to distinguish between production (including production of weaponry and war materiel) and consumption.
GDP is a measure of production. It is not a measure of consumption of consumer goods. GDP was up because of massive spending on the war. Consumers were not better off (relative to what they would have been without the war), trade of regular goods and services was not very good.
From the article:
according to some economists, the national living standard barely stayed level or even declined (Higgs, 1992).
A sustained constant standard of living over several years is not a good thing, relative to the counterfactual of what would have happened without the wartime spending. [Other than the depression, the US saw sustained increases in living standard throughout the rest of the period.]
The original argument was that you were modeling wartime rationing, liberty bonds, and victory gardens. All of these are related to a reduction of civilian trade and consumption goods, in order to divert resources to the war effort.
So, there is a good logical argument for a production or a military production bonus. +X% military production would definitely make sense for Nationalism. Trade route bonus really doesn't.
I also think if you're looking for a guide to Nationalism, the 19th and early 20th century European nationalist movements should be the main source for inspiration; German and Italian Nationalism around unification, US jingoistic nationalism surrounding the Spanish-American war, Imperial British Nationalism and volunteerism at the start of WW1, and then maybe anti-colonialist 20th century nationalist movements in India, Vietnam, Indonesia, Africa, etc.
except for the part about blockades making domestic trade more powerful. I have no idea where that came from.
The existing policy increases the value of trade routes. This makes no sense. That is my entire point. The example being cited is not a demonstration of Nationalism increasing trade profitability.
No one said anything about nationalism being good for the private-sector economy...
? The private economy is exactly what trade routes and gold income are modeling. If Nationalism is boosting trade route income, then it is boosting the private economy. The game is modeling a Civilization, not just a set of government accounts.
Maybe it's time to quit beating a dead horse.
If you don't want to discuss the issue, then you are free to stop posting. Please don't tell me what I can or can't comment on.
I hardly think that the horse is dead; the policies are clearly still in a state of flux.
If Thal wants to ignore my suggestions he is free to do so.
And I'm not just sniping, I'm proposing alternatives.
"Real logic is subjective" doesn't mean remotely the same thing as "There is no logic in subjectivity." If you're going to quote people, please get it right.
"Real logic is subjective" was unclear, I should have written that differently. I was aiming to paraphrase (any direct quotes I will put in quote tags) but I did a bad job.
Nonetheless "there is no logic in subjectivity" also strikes me as missing the point. Clearly some effects make more logical sense than others, and interpreting this is not purely subjective. It makes sense that Scientific Revolution gives new technologies; it would not make sense if Scientific Revolution gave extra culture from granaries. It makes sense that Free Speech increases culture generation; it would not make sense for Free Speech to reduce military maintenance costs. It makes sense that Discipline boosts military strength; it would be weird if Discipline provided extra food.
Certainly there is a degree to which the degree of flavor fit is subjective, and certainly there can be a tension between gameplay value and historic flavor, but equally there is clearly a degree to which real logic can be applied in mapping gameplay effects to real history. The latter should not be abandoned.