Alright, champ. Let's have some fun.
The Force conceived Anakin Skywalker to bring balance to the Force.
For a thousand years, the Sith had been sowing chaos, destruction, and imbalance throughout the galaxy:
The current war had been the result of a thousand years of careful planning by the Sith - generations of bequeathing knowledge of the dark side from mentor to apprentice. Rarely more than two in each generation, from Darth Bane forward, Master and apprentice would devote themselves to harnessing the strength that flowed from the dark side, and to making the most of every opportunity to allow darkness to wax. Facilitating war, murder, corruption, injustice, and avarice when - and wherever possible. Analogous to introducing a covert malignancy to the body politic of the Republic, then monitoring its spread from one organ to another until the mass reached such size that it began to disrupt vital systems...For two hundred years before the coming of Darth Sidious the power of the dark side had been gaining strength, and yet the Jedi had made only minimal efforts to thwart it.
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Darth Tenebrous' master revealed the thousand years of growing dark side power as he ripped open the fabric of the Force:
One hundred years earlier, Tenebrous's Twi'lek Master had opened a small rend in the fabric of the Force, allowing the dark side to be felt by the Jedi Order for the first time in more than eight hundred years. That had been the inauguration, the commencement of the revenge of the Sith. And now the time had come to enlarge that rend into a gaping hole, a gaping wound, into which the Republic and the Jedi Order would to their own hazard be drawn...The rend that Tenebrous's Twi'lek Master had opened in the fabric of the Force had been felt by the Jedi, and already the Order was beginning to show signs of circumspection and languor.
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Palpatine's acension to Dark Lord of the Sith caused a shift in the balance of the Force:
But the moment didn’t constitute an ending so much as a true beginning, long overdue; it was less a transformation than an intensification - a gravitic shift.
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The Clone Wars escalated the state of unbalance to a degree that was never before seen by Darth Maul, who would have felt all the following:
https://www.youtube.com/watch?v=GvJiunochio&t=0m25s[/i]
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Likewise during the Clone Wars, the Father's dwindling power escalated to the point that he would soon die:
The Father knew his days were numbered - facing his impending demise, he needed to find another to keep the balance.
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The below quote establishes a direct correlation between the presence of the Jeid in the galaxy and the balance of the Force.
Thus, Order 66 and the Great Jedi Purge would have likewise escalated the unbalance to where it was fully submerged within the dark side:
Yet, despite the Empire's thorough and systematic attempt to erase the Jedi Order from history, the Force works to restore balance, and the Jedi are now poised to return.
All of these factors would have brought about the creation of the Chosen One, since the prophecy, as you agree, would have been accomplished when the unbalance was in its absolute peak.
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Now, I'm going to be generous and assume that Darth Plagueis and Palpatine's meditation was likewise factored in this.
Note that it doesn't matter, since their action was one of many, both in the past and future, that contributed to the Chosen One being birthed when he did.
So really, this notion that Darth Plagueis and Palpatine's meditation had any impact other than an unquantifiable yet small degree is unsupported and wrong.
So no, it's not an unprecedented act. The Chosen One was not birthed as a direct result of it, as I proven with the dates. The Force never even retaliated.
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However, Darth Plagueis and Palpatine's meditation are not only not necessary for the Chosen One's creation, but there's little supporting it even actually occurred.
The element that Plagueis couldn't measure is the will of the Force. The Jedi hear this call, and I believe the Sith do, too. I don't think the Force felt compelled to speak to Plaguieis."
As stated here by Luke Skywalker, and also stated by myself prior to reading this quote, Darth Plagueis can't measure the will of the Force.
Many Jedi were aware of the changes, the drift toward darkness.
Furthermore, Darth Plagueis wrongly assumed the shift was absolute with his meditation, but we know that is not true.
The above sources specify that the unbalancing was a gradual shift, not a sudden move. Likewise, numerous events attribute to this shift.
In reality, the effects of the meditation can be attributed to both coincidence and Anakin Skywalker's growing power.
http://i.imgur.com/JcAQkQs.png
Anakin Skywalker is the ultimate imbalance in Star Wars. The meditation would have been *eclipsed* by Skywalker's growing power and imbalance.
Likewise, all of the events that are cited above are in direct correlation with Skywalker's growing power up until the ultimate eradication of the Jedi in Episode III.
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Thus, the meditation, technically speaking, did next to nothing. Everything it claimed to due could have happened due to other reasons, as cited above.
To attribute anything to the meditation would be complete and utter speculation. Thus, it's not a feat. Darth Plagueis is dead, and so are you. 👆