The WSJ takes a look at how Facebook classifies users as either liberal or conservative, and then, how this yields either liberal or conservative perspectives (social media propaganda posters) within one’s news feed.
This demonstrates the thesis of this blog – that social media has become the world’s most effective propaganda operation:
See Liberal Facebook and Conservative Facebook, Side by Side
Source: Blue Feed, Red Feed
Update: I noticed that I mostly see left-wing propaganda posters in my news feed timeline. I assumed this was because the left-wing has better propagandists. However, an alternate explanation is that Facebook believes me to be left-wing and therefore drives more left-wing propaganda posters to my news feed. For the record, I do not belong to any political party (see the about page for more info) and do not support either major political party.