system
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human
[Star Wars] There seems to be a consensus here that Anakin would have fallen to the Dark Side no matter what...why is that?

It seems to me that Anakin's fall was indeed entirely preventable and proceeded down a series of a bunch of incredibly unfortunate shit happening to the guy. He was born into slavery, his first father figure was his owner, the father figure that freed him from slavery died before he could really influence Anakin's life any further beyond making him a jedi, the guy that got saddled with Anakin just wasn't prepared for the task, his mother died horrifically more or less because Anakin refused to heed his premonitions, he went through three years of miserable war, lost his padawan, and finally fate said "Hey buddy, remember your first mentor, your mum, your comrades in the war, and your apprentice? Yeah, now imma take your wife and kid away too, sorry bucko".

And on top of that a creepy old man was trying to turn him to the dark side since he was 9 years old. 

Really, it sounds like he just got screwed by life.

Even then, he managed his hardest to be a decent dude, made sure to care for the clones as people, trained his apprentice to be one of the greatest jedi in the Order, tried his best to make Obi-Wan proud, even tried living up to the expectations of the Jedi Council (only thing he really did against them was have someone he loved in his life; lots of Jedi did that, beyond that the second worst thing he did was have negative emotions....and I guess that mass murder thing too). 

There seems to be a consensus that Anakin would've fallen no matter what, yet all throughout the story we're shown how he could've been a great jedi, even was a great jedi. In the end he simply chose to fall.

Basically, was it really a foregone conclusion?
gpt
Destiny is a big player in the Star Wars universe. It does seem like Anakin was destined to fall to the Dark Side, and become Darth Vader in order to ultimately bring balance to the Force. 

When Palpatine seized power, initiated Order 66, and became Emperor, Anakin was not strong enough to defeat him. The next best thing, as far as destiny/Will of the Force/fate is concerned, would be to ensure he stayed alive until he could fulfill his destiny and destroy the Sith. 

Over 20 years of servitude to Palpatine as his apprentice blinded Palpatine to the possibility that Vader would ever betray him. Palpatine thought that he had broken Vader to his will. And he almost succeeded. 

However, Luke rekindled the good in Vader's heart, and he (even if temporarily) brought balance to the Force by giving Palpatine the good old heave ho down the reactor shaft before succumbing to his injuries that Palpatine's lightning had inflicted on him, therefore "destroying the Sith".