So here we are in the dystopia predicted 20 years ago. How are we going to trust historical records when they can be changed on the fly to support whatever is en vogue?
This is a good question, and more practical than it might look like: there have been instances of major media outlets being caught quietly editing their "early" covid reporting from spring 2020 later in the pandemic, to better match the changes in the narrative.
I deeply regret not bookmarking some of the examples: this is now ungooglable, and not having a prooflink makes me sound like a conspiracy theorist.
In the mid seventies this trend reversed and temperatures started going up. The new explanation became different emissions from power stations. By the end of the 80s climatologists were warning about global warming but they faced the issue of why it didn't happen between the 40s and mid 70s. By the turn of the millennium they'd started replacing historical data with recalculated values that reduced the extent of the mid century cooling, and once they crossed that Rubicon new versions of old data started being released regularly. There was always a new reason being found why people couldn't accurately read thermometers back in the day. New historical data smoothly and silently replaced old data on government websites. By the 2010s global cooling had vanished from the record entirely and temperature graphs showed a flat trend during that era.
Of course censorship isn't complete without denial it ever happened. Hence if you look for global cooling today, our glorious tech firm overlords will direct you to denials it ever existed at all. You have to know where to look to see the old newspaper clippings, the videos of Leonard Nimoy telling his viewers about the coming ice age, screenshots of old graphs, scans of the letter to the president etc.
And finally, because erasing all the old copies of documents is so hard, no historical editing regime can survive without training the population not to look. The above information is verboten in polite society, the media won't touch it along with many other things. All respectable people know never to question The Science lest they be immediately fired from their job or worse. There are people in this thread gamely saying they will just read pirate versions of these books to their kids, but that's not how it works. Give it ten years and reading the old editions of Dahl will be considered a firing offense and your kids will be trained by their teachers to disown you, if they catch you with such copies. Because that's already happened for issues the leftists care about more.