Vox has an oral history of the Game Of Thrones fan theory: R + L = J. “But while Star Wars fans may never know conclusively if Jar Jar was meant to have been a Sith Lord, R+L=J worked its way into the parlance of Game of Thrones fandom from a very early date, and became, over time, a core part of how fans of the books understood the series’ direction, an arc that later applied to the TV series as well….It’s also the story of a fandom evolving over two decades along with the internet itself.”