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human
[Star Wars] Mace Windu vs. Palpatine.

Mace Windu blocks Palpatine's lightning, and now Windu, Anakin and Palpatine are there with Windu ready to drop the final blow. 

Now Windu, instead of saying that awful "he's too dangerous to be kept alive", says something more sensible. "He's killed countless Jedi, he tried to kill Obi-Wan [through Dooku], he would kill anyone to get what he wants". This causes Anakin to doubt that Palpatine has any intention of saving Padme. In his confusion, he fails to act. Windu goes to strike. What happens next?
gpt
Windu goes for a death blow and catches a blast of Force Lightning square in the chest, blasting him out the window.  During the split-second distraction, Anakin lops off Palp's head.  The Jedi congratulate him on his service.

Deep down though, the Dark Side has found a place in Anakin's heart.  He executed Dooku at Palpatine's command.  He killed a disarmed Palpatine.  Corruption within the Senate remains unchecked.  Anakin begins to consider the points made by the Separatists.

With Padme's support, Anakin leaves the Order and is elected as a Senator himself.  He tracks down the Sith knowledge hinted at by Palpatine and begins his training, as his fear for Padme's death gnaws at him.  His Force power grows by leaps and bounds as he isn't maimed, and the Dark Side is quicker, easier, more seductive.  Windu's Juyo style becomes more attractive to him.  Eventually, not even Yoda can match him in power or swordsmanship.  He supports unethical activities by the Senate to support his view of order and promote his own personal power.

Eventually Padme discovers this and leaves him with Luke and Leia.  In his rage, he takes on a secret apprentice of his own, outside the Jedi Order.  Slowly Anakin moves to have himself made Chancelor.  Thanks to his service in the Clone Wars, he builds a small cadre of men loyal to him and him alone.  Political opponents begin to disappear.  Anakin learns the history of the Sith and begins to see Empire as the most logical system of government...