I agree with your point, but social media certainly appears to amplify the effect, regardless of what the root cause may be. I wonder if perhaps the main probl

I agree with your point, but social media certainly appears to amplify the effect, regardless of what the root cause may be. I wonder if perhaps the main problem is that social media changes the structure of human interaction by allowing those with similar ideas to congregate instead of being spread across the network in a diffuse manner. Like in the 1970s if you believed that Aliens were here on Earth and abducting people, the vast majority of people you interacted with would think you’re a crackpot. It would be very difficult to find validation that your ideas are good. Today you simply need to open a Facebook group for UFO conspiracy theorists and you’ve got all of the confirmation bias you need. It has never been easier to find people who agree with you.