This is a pretty low effort comment, but more importantly is conceding the several upthread assertions that freedom of speech has historically been effective at correcting bad ideas.
If your claim is that we shouldn't expect this to continue in the future, that's a whole new claim that you need to support.
I mean, a teleological view of history and ethics is just so absurd that it disturbs me that professed "rational" scientifically minded people believe it. There's no basis for believing just because things "tend" to get better that is in itself a causative argument about some intrinsic nature of humanity.
I mean, even the example used ("the noble class") is preposterous on face because:
1. The Russian Revolution? Germany 1849? Even the American Revolution? None of these are about ideas, or "shining the light on ignorance" -- they're about putting the nobility up against the wall. If there's some kind of teleology at play here, it's not that we thought about it in the marketplace of ideas long enough and decided to do away with the concept.
2. Nobility still exists! At best, this just means we live in a secular society, where we no longer believe the Word of God justifies massive inequality.
Only as formality in some countries. In America, there are some people who call the Kennedys "America's aristocracy", call JFK's white house "Camelot", and make references to members of the Kennedy family being "entitled" to office, but there's no legal basis for it.
All the events you list happened in the wake of the enlightenment, the period when ideas challenging the validity of the dominance of the monarchies, nobles and the church were disseminated and popularised in large part due to the invention of the printing press - i.e., an instrument of free speech.
This either trivially true, in the sense that the Western canon builds on itself, or patently absurd, in the sense that you attempt to frame the 1918 revolution as being a mere effect of the invention of the printing press 500 years earlier. Neither strikes me as being particularly rigorous historiography.
> America literally has a nobility class right now.
Literally nope. For example, there is no law that says the word of one group of people is worth more in court than another group. There are no laws saying only certain people can be in power based on their ancestors. There is no law enshrining divine right.
I think "routinely" is overstating it. These days, "infrequently" is probably more accurate. US politics is very much of the monied, for the monied. Without a huge warchest, barring odd circumstances[1], you've got little chance of making it through the various filters.
[1] e.g an extremely unpopular incumbent against a popular challenger with excellent ground game.
For example, the idea of a nobility class.