The most important platform to be closed off 2017-2019 was YouTube. Before 2017, YouTube was a very open platform, with easy monetization and almost no moderation of legal content. By the end of 2019, thoughtcrime (anything to the right of Ben Shapiro) was thoroughly purged.
In March 2017, several news organizations (The Times of London, the Guardian, WSJ) published coordinated articles about ads appearing next to "problematic" content on YouTube. This led to the British government summoning Google to explain and an advertiser boycott.
[as an aside, no one sane believes that an ad appearing next to a YouTube video implies the company behind that ad endorses or knows about the content of the video; this was 100% astroturf. No one knew or complained until the news articles hit]
Google then began restricting ads/monetization to large accounts that had been manually reviewed, and greatly expanded the scope of its hate speech policy (for instance, banning insults "associated with marginalization" - no points for guessing who defines that).
YouTube participated in the August 2018 deplatforming of Alex Jones (along with Apple, Facebook, Spotify, LinkedIn, Pinterest, Vimeo, and Twitter), permanently banning from the site. Jones' deplatforming was the start of a slippery slope.
YouTube expanded to more than 10,000 moderators in 2018. More than 90% of removed videos were seen by fewer than ten people.
In August 2018, YouTube also began banning state-sponsored content from Russia and Iran. This is less significant from a freedom-of-thought perspective, but I think sets a hard "no later than" date by which US intelligence agencies were getting involved.
In January 2019, Google began algorithmically suppressing "borderline content" meaning content that did not violate their guidelines but they judged could be harmful. Unlike bans, algorithmic suppression is silent and almost impossible to prove or fight.
By Dec 2018, Google was removing millions of videos per quarter, though mostly being spam or scams (which I think is justified, otherwise the site is unusable). But around 1% were for political reasons, and this number exploded in 2019 when moderation policy was changed.
Some of this zeal (more than 58M videos removed in Q3 2018) was to "demonstrate progress in suppressing problem content" to "government officials and interest groups [read: astroturfed NGOs]" who were (and are - see the UK's OSA) keen to control what is on YouTube.
In June 2019, YouTube demonetized and then banned Steven Crowder for calling a Vox journalist an "anchor baby" and a "lisping queer", which they acknowledged did not violate their policies [also note the Daily Beast calling insults "gay bashing," which they are not].
In Q2 2019, Google began "prohibiting videos alleging group superiority" [no prizes for guessing for which groups this was enforced] and as a consequence ramped up suspensions fivefold, banning more than 17,000 channels and deleting more than 100,00 videos and 500M comments.
Google eventually began banning "malicious insults based on protected attributes" [no points for guessing which attributes were protected or what counted as an insult] in December 2019.
In 2016, there was a thriving alt-center/"anti-woke"/anti-feminist ecosystem on YouTube, often connected to the New Atheists. By 2019, almost every major creator was banned, demonetized, or became leftist to survive, replaced by anarchist/Communist "Breadtube."
Since The Youth are illiterate troglodytes, video content served by algorithmic feed is their major source of information, and until TikTok (which has similar policies), YouTube was by far the largest source of this (by orders of magnitude).
As such, the purging of anti-woke/anti-feminists from YouTube killed any sort of semi-popular intellectual opposition to the Great Awokening under 30. The only site more emblematic of the annihilation of open internet discourse 2017-2019 might be Reddit.
Since 2009, medical schools have had to prove they sufficiently discriminate against white men ("achieve mission-appropriate diversity outcomes") to get accredited.
White men are now significantly underrepresented among med school students.
Fortunately, competence isn't that important in doctors, so purging white men in favor of "underrepresented minorities" (blacks, LatinX) who can't pass clinical exams shouldn't matter.
European IQ's rising due to natural selection (as measured by PGS) continuing into the modern era whereas it stalled in East Asia could have been predicted from Gregory Clark's genealogical studies in both regions.
Clark found that "survival of the richest" was the rule in England from 1300-1880 or so, with huge differences in surviving offspring by class and this was much weaker in Qing China because higher class women didn't have more kids due to elite polygamy.
(IQ is not the only trait that goes into income or wealth, of course, so selection for wealth is only indirectly selection for IQ and also selects for a package of other traits, some of which are collective goods like IQ and some of which are not.)
The Bancroft Prize (one of the most prestigious history awards, given by a panel of historians for works on diplomacy or the history of the Americas) was given in 2000 to someone claiming guns were really rare in colonial America (he committed fraud by changing quotes).
This should have been obvious nonsense to anyone who knows anything at all about colonial America, of course, and yet a panel of professional historians thought it was work at the pinnacle of the field until some random blogger pointed out all the fraud.
I very strongly appreciate this essay and wish there were a hundred more like it for other orgs. The SPLC is one of the biggest and most important nodes in the closure of the Internet, coordinating debanking and censorship outside the formal state.
Amazon, for example, incorporated SPLC judgements into their pipeline automatically, and this is the norm in the financial industry.
The SPLC coordinated pressure campaigns against the private sector 2017-2022, specifically Internet companies and payment processors. The easy for any individual company to do is knuckle under, especially since most decision-making managers will be sympathetic to begin with.
A common normie folk belief is that AIDS was ignored by The Establishment out of homophobia. The opposite is true; AIDS became the most researched disease in human history within a few years, and gay orgs strenuously fought measures that might have stopped it.
The attitude of gay orgs during the peak of AIDS was: 1) The REAL epidemic is stigma (it was not, it was HIV) 2) You (meaning mainstream society) must do absolutely everything in your power to save us without us having to change our own behavior in any way at all
Gays were eventually bailed out of the consequences of their own behavior by extraordinary amounts of public research (mostly conducted and paid for by non-gays) plus expensive and continuing public funding of medicine for them (PrEP).
My view: the Great Awokening is over, but, by default, will be back even worse in 20 years. This cycle has already happened twice, with the 60s/70s New Left and 90s PC. Each time, some of the worst excesses are undone but nowhere near enough to reverse the previous wave.
What I think causes the ~20 year cycle is the education system; the natural result of paying attention in school is to be an insane leftist.
Every major conflict in US history, and most in world history, is taught as left vs right (sometimes "reformers" vs conservatives"), with the left always winning, always being in the right, and always vindicated by history. It's very simple to extrapolate from that!