Answer:
i dont know if this would be helpful but modern and democratic are smiliar in the way that both have rules that you should follow.
Explanation:
Railroads, intermodal, rail-to-truck transport. There might be more. And btw when I mean rail well I can’t really explain it but here. https://www.csx.com/index.cfm/about-us/company-overview/railroad-dictionary/?i=C sorry I’m so bad a explaining things! Hope this helped
Actually the real answer is the second and first world war pouring money into the us economy for output. If that is not an option it would be the invention of the steam engine and the 1800's locomotive industry.