>>97975
>I'm looking for books/articles that depicts in a positive light the libertarian era in the US. In particular I'm fascinated about the rise of big companies, private infrastructures, etc
I suppose I could suggest the three volume work of "The Economic Mind in American Civilization" but the notion of calling the 1800s (or any era in US history) a "libertarian era" is rather erroneous.
One thing you'll notice with American history in general is that for the most part, liberty is very rarely every gained throughout the course of US history, rather it's slowly lost through a period of a few hundred years to what we have now. This can be noted with the development of the Federal Reserve, the introduction of the income tax, the implications of the Civil War, World War 1, etc etc. That's not to say there's not notable events that contradict this trend (such as the repeal of the alien and sedition acts) but such acts are hardly indicative of US history as a whole.