The algorithms of google, facebook etc. are responsible for the spread of misinformation (and propaganda / fake news).
When content (or web page) gets shared (or clicked) more, it appears at the top of google search page result. Therefore will be the first thing people click. Spreading further the misinformation.
When other relevant information gets tossed back down the page. Not many people scroll past the 3 top google results on a search page, let alone to page 2. Same principle for Facebook.
Silicone Valley has created a monster that they can’t seem to tame unless taking it down entirely. Rebuilding the algorithm that lays at its foundation.