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It’s a tough battle upwards, the established propaganda model helps make sure of that, but undeniably at the end of the day, the workers in the US hold more than enough power collectively to threaten decision makers into compromise (and, if you have the guts, submission). I’m not even talking about violence, I’m talking about things like withholding labor and simple sabotage.
If you can pull a few people out of filter bubbles, it helps. But it’s up to you to decide if it’s worth the investment, it really depends on where you are and what you can do.
You can also engage in one-person propaganda efforts, like putting up critical posters/stickers. Just don’t get caught.