Okay, let me speak for a minute on the “myth of the chosen one” who would “bring balance to the Force”.
The Force is an energy field, created by all living things. An energy field. Like sunlight, like the electromagnetic spectrum.
As such, it is there, JUST there. It has neither light nor dark aspects. It simply IS.
It is HOW YOU USE IT and WHAT STATE OF MIND YOU ARE IN that determines if it is light or dark. Using the Force with Anger, Fear, Hate, that’s dark aspected. Using it in Peace, Compassion, Generosity, those are light aspected. It’s a tool, like a crossbow. Use a crossbow in anger against a tree, it’s not good, but not bad either. Use the crossbow in anger against a person, that’s manslaughter. Use a crossbow to protect a person from another, it’s Guardianship. Same thing with the Force.
That’s the first thing.
Second is this:
You have a hundred thousand weiders of the Force who use the light side. You have (maybe) five weilders of the Force who use the dark side. Imagine a scale if you will. Place 100,000 grains of rice on one side, five on the other. How do you achieve balance between the two pans?
You can either a) add a whole bunch to the pan with only five in it, or b) remove 99,995 from the other side.
So, Vader DID bring balance to the Force, the only way he could. He removed almost all the Jedi from the universe. So there are two Darkside wielders left (Sidious and Vader), and two Light Side wielders left (Yoda and Obi-Wan). In the Extended Universe, there were more Light Force users, but they aren’t in discussion here.
But, and this is just my opinion, Luke went the Yoda road when he started teaching more Force Users after all this happened. He started with the “Hate, anger, fear lead to the Darkside forever….” yadda yadda yoda. And he got called on it multiple times. Mara Jade said that Luke didn’t really teach her anything new, just gave her a new battery to hook into. Kyle Katarn used both light side and dark side powers, as did many of the Jedi who came later. Corran Horn basically beats into Luke the point that he was a fully trained and emotionally stable person, who has anger, who has fear, who hates with a passion, but who has learned to temper those with reason and compassion, and not give into those emotions while wielding power over someone he is tasked with apprehending. So this stressing of “avoid anger, fear, hate” was counterproductive and insulting.
My thought from there was “if you take a child, two years old or so, and put them in an environment where they are encouraged NEVER to hate, NEVER to be angry, NEVER to fear, and whodoesn’t know how to deal with them, the first time they feel those emotions, they won’t know how to move through and to the other side and let those emotions go.”
Which is what happened to Anakin. He had no clue how to deal with a love so intense that he feared to have anything happen to the object of his love, because the very process of maturing he was in that sterile test-tube laboratory environment where he is told “don’t feel that” instead of “yes, it’s hard, here’s what you need to do in order to get past it”.
Death is part of life. All that is living will die. It is a state of being, not something to be feared, it’s something to be accepted when it happens, no more traumatic than going to the showers after a good football game. And about as problematic. In some ways, it’s the best part of the game. Once you understand that, on a visceral level, death loses it’s grip on you and becomes just another state of living. The soul continues, and it’s nothing more than a summer vacation between grades in school.
This is where Obi-wan and Yoda went wrong. They made death something to fear, they made fear something to be avoided at all costs, and they left Anakin with NO coping mechanisms.
And Darth Sidious knew that.
And that’s how he corrupted one of the best Jedi there was.
And the Prophesy was fulfilled, by killing nearly every Jedi there was, slaughtering them like the sheep they had become, because they couldn’t believe treachery from their own people. And because the Clones were obeying orders, ones conditioned into them, there was no warning of hatred or rage before the attack to kill them, or if there was, the Jedi in question missed it in disbelief.