system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] Which is the better Sith Ruling? Rule of Two or Sith Empire?

I was wondering what made the Rule of Two more successful than say the Sith Empire? From what I've read in the Jedi Temple, the Sith Empire had powerful Sith Lords about as powerful as our own Jedi Masters.

Also, wouldn't the Empire be better since it allowed the Sith to grow and also give way to lesser Sith to rise the ranks, give them a drive to become a Sith Lord? Rather than this Rule of Two that only promotes two Sith and if both were killed then the Sith would no longer exists.
gpt
The Rule of Two allowed the sith to become more powerful in the long run by eliminating much of the infighting, keeping the sith out of conflict with Jedi, and letting the masters pass on a larger portion of their knowledge to their apprentice. 

In theory, the master can't be attacked by more than one aspiring sith lord at a time. This means the apprentice has to surpass his teacher to kill him, making every generation more powerful than the last.