system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] If it's so easy to go to the Dark Side, why are there so few Sith?

Anger, hate, jealousy, rage, personal attachment and only two Sith in the Galaxy?
gpt
There use to be tons of Sith, there was an entire Sith Empire that was constantly at war with the Republic, but the Empire imploded due to lots of infighting among the Sith.  That's when Darth Bane came along killed all the other Sith and invented the Rule of Two, which stats that only two Sith Lords could exist at any given time: a master to embody the power of the dark side of the Force, and an apprentice to crave it. 

Also Dark Force User != Sith Lord, Sith are a very specific "cult" of dark force users, for example Kylo Ren is not a Sith, he is a Dark Force user.