Is 19th Century U.S.A. the closest we've been to a Libertarian Ideal?

Sorry for not showing up till the second page in a thread started by quoting me. I was originally responding to the following statement.

There is often the sentiment, as has already expressed in this thread, that libertarianism is somehow equivalent to anarchy, and will lead to society falling apart. I’m not putting up (late)19th century US as some sort of exemplar of libertarian ideals that should be emulated, but as a real world setting which approximated the ideas of limited regulation. It resulted, not in an unsuccessful and anarchist failure, but in the richest and most powerful country in the world, a great magnet for immigration from all around the world. It may not ensure a great life for every single person, but it can certainly be associated with lots of things we regard as positives - growth, innovation, improving standards of life on average. Not social strife and instability and great injustices. The greatest social strife in the period was the result of the most non-libertarian of practices - slavery.

On the flip side we have the real world setting which approximates the ideas diametrically opposed to libertarianism, i.e communism and its close counterpart socialism. The real world setting that most closely approximated their ideas were the Soviet Union, pre 1980’s China, pre 1990’s India. I really don’t feel like listing down the mind boggling human suffering that took place in these areas because too much power was concentrated in the hands of government. I will instead quote Amartya Sen, himself a very ‘left’ oriented thinker, on Hayek