I think you're right, but I also think it's worthwhile to look at Edward Bernays in the early 1900s and his specific influence on how companies and governments to this day shape deliberately shape public opinion in their favor. There's an argument that his work and the work of his contemporaries was a critical point in the flooding of the collective consciousness with what we would consider propaganda, misinformation, or covert advertising.

> There's an argument that his work and the work of his contemporaries was a critical point in the flooding of the collective consciousness with what we would consider propaganda

I would rather say that Bernays was a keen observer and understood mass behavior and the potential of mass media like no one else in his time. Soren Kierkegaard has written about the role of public opinion and mass media in the 19th and had a rather pessimistic outlook on it. You have stuff like the Dreyfuss Affair where mass media already played a role in polarizing people and playing into the ressentiments of the people. There were signs that people were overwhelmed by mass media even before Bernays. I would say that Bernays observed these things and used those observations to develop systematic methods for influencing the masses. The problem was already there, Bernays just exploited it systematically.