... instead to raise one reliable man who is his partner until he sees his end coming? I mean, the rule of the Two were made in order that the Sith-lords are becoming stronger and stronger by every generation. But Sidious told Anakin in the 3rd Prequel-Part that he thinks that Darth Plagueis was a fool by teaching his apprentice all of his knowledge. So that, if Anakin would have known, that Plagueis was the mentor of Sidious, he might have foreseen his own faith. And he saw it clearly when Sidious told the young Skywalker to kill his father. But having such behaviour in mind, an apprentice having in mind, that his master will never reveal all his knowledge to him in fear of being executed. What kind of stability is that? Thus the masters of the Sith will become weaker and weaker by every generation inspite of rising in knowledge and power as intended by Darth Bane Thus I think even when Sith are always thinking in extremes. Sidious was to extreme in his execution of insidious and ruthless power. Every society needs at least a bit of reliability and spirit of gluing together for being stable. Was Sidious just to good for his first apprentices to be overthrown by them, developing by and by a contempt for them and feeling the need to replace them by a better and stronger one? Or was he from the beginning not inclined to let rise his apprentices to really strong personalities, who could challenge him one day. Thus he is actually replacing the Rule of the Two by the Rule of One with some provisory, easily substitutable henchmen and stooges, nothing more?