
"This revelatory and dramatic history of disinformation traces the rise of secret organized deception operations from the interwar period to contemporary internet troll farms"
https://www.amazon.com/Active-Measures-History-Disinformatio...
Countries have been interfering in the internal workings of other countries for centuries, if not millennia. If you want to read up on more recent accounts of this, many of which predate social media, the book Active Measures by Thomas Rid is a good place to start.
Or you can continue to think that this is all just made up "propaganda" and we're all fools, but you alone have seen the light.
https://www.kqed.org/news/11217187/from-his-home-in-russia-c...
https://www.npr.org/2018/04/25/586099619/the-russia-investig...
For the most part, it's low-effort manipulations that very occasionally take hold---I can remember the anti-nuclear protests against the deployment of the Pershing II missiles in Europe---but the internet and social media have dropped the bar for "low-effort".
The Kill Chain, by Christian Brose
Active Measures, by Thomas Rid
Sandworm, by Andy Greenberg
Fatal System Error, by Joseph Mann