->''"Is... Is that our new Arch-nemesis?"''
-> *Cue montage of the protagonist in a BadFuture defining BewareTheSuperman*
->'''"No. I wish it were."''

InAWorld where [[MagicalGirl Magical Girls]] are commonplace, Kendra and her friends have fought against evil since grade school. However, one day her life takes a dramatic shift when Chronos, a natural born Mage with the power to see the future corners her outside of school. Chronos has been plagued with visions of a future where Magical Girls seek to control the world, [[WellIntentionedExtremist for its own good of course]], without anyone standing in their way, and Kendra is right in the center of it all. Kendra is quick to point out that it's [[IncorruptiblePurePureness impossible]] for a Magical Girl to turn evil.

"Except," Chronos is just as quick to reply, "for the times that they do."

Disturbed by these revelations, Kendra makes a heart-wrenching decision: She breaks off from her team, her friends and her family [[FaceHeelTurn to become a villain instead]]. But rather than [[JumpingOffTheSlipperySlope slope jumping]], Kendra's plan is (with the much reluctant help of Chronos) to hunt down Magical Girls at most risk of becoming corrupted, [[AntiVillain and either force them to change their ways...]] [[DarkShepherd Or else.]]

A WebComic by Emily Martha Sorensen, [[http://worldpeace.emilymarthasorensen.com/about.html To Prevent World Peace]] focuses on an interesting take on how a world with Magical Girls in it could develop, with a delightful sprinkling of Worldbuilding and comedy to balance out the riveting main plot.
!!Tropes in ''To Prevent World Peace'':

* Alliterative Name: Tiffany's M.O. with all her sentient magitek of death... that isn't about death.
--> Kendra: You can't leave me alone with that girl! She's crazy!
--> Tiffany: Hi, Stevie the Shower! Hi, Linus the Light Bulb! WHOA!! [[BreadMilkEggsSquick Robbie the Rocket Pack]]!
--> Chronos: Indeed, and you still haven't given me a convincing reason to stay.
* AntiVillain [[VillainProtagonist Protagonist]]: Kendra becomes this, to prevent a BadFuture where [[MagicalGirl Magical Girls]] control everything.
* AlwaysChaoticEvil: Played with. Born mages are believed to be evil, but [[WhiteSheep Chronos]] proves there can be good-natured mages as well. Their villainy seems to be more a matter of upbringing than anything else.
* AlwaysLawfulGood: Played with. Magical girls are considered good by definition. Their magical system requires the user to be pure-hearted, but if a magical girl is strong-willed enough she can keep her powers even after losing her innocence. For a time at least.
* TheCorrupter: Rhea ''loves'' luring magical girls to villainy.
* DarkShepherd: Kendra's methods of culling corruption from the world Magical Girl population can be rather cold. However, she takes absolutely no joy from it.
** BadFuture!Kendra as well, but a lot more heartless, [[WellIntentionedExtremist hence being a separate trope]].
* TheEvilsOfFreeWill: The Union-controlled BadFuture Kendra seeks to avert.
* FaceHeelTurn: Right in the first chapter no less!
* {{Foreshadowing}}: Whenever Emily worldbuilds in the commentary, keep a lookout. Sometimes she hints at something that will involve that bit of info in the next chapter.
* GrowingUpSucks: In most parts of the world magical girls are expected to give up their powers as they reach adulthood. The WordOfGod confims this is bound to change eventually, since magical girls are becoming more and more aware of their power.
* GenderRestrictedAbility: Only women can become magical girls. Adverted with born mages, who can be both female and male.
* HeroicWillpower: If magical girl is strong-willed enough she can keep her powers even well past losing her innocence.
* MagicalGirl: Well... ''Duh.''
* {{Magitech}}: Tiffany's inventions - according to WordOfGod, they are not scientifically sound, and it's only her magic that allows them to work.
* OhCrap: One from Kendra and Chronos when they realize that [[spoiler: The Union (which is WellIntentionedExtremist personified for magical girls) has begun construction. But the architect isn't Kendra. IT'S HER BEST FRIEND.]]
* NotSoHarmlessVillain: [[spoiler:Rhea may seem unimportant in the grand scheme of things, but she is colossally malevolent and quite good at [[TheCorrupter what she does]].]]
** [[spoiler:She even succeeds at killing her asshole RANGED-Touch-Of-Death Great-Uncle by buying off his ninja security. Of course, the fact that he was such a paranoid, trigger-happy boss helped.]]
* PubertySuperpower: Inverted. Magical girls gain their powers as young children and are expected to lose them during or shortly after puberty.
* ScheduleSlip: Largely averted so far. The author is in fact two chapters ahead of what is posted online, and is posting it page-by-page every friday.
* ShoutOut: The commentary for Chapter Five never so much as touched on it, but the situation with the Austrailian Magical Girl sounds somewhat remanescent of [[Anime/PuellaMagiMadokaMagica Kyuubey]].
* UnequalRites: Magical girls are believed to be always pure-hearted and good, born mages are seen as villains. Other magic users consider magical girls' system to be “cheating”, mostly because it lets them survive as depowered humans, when their transformed form is killed.
* WhiteSheep: Chronos.
** Chronos has an outward persona as a True Neutral slacker, saving the world so that she can stop having traumatizing nightmares, and funding the protagonist by stealing millions through stock marketing and psionic powers. Whether or not she's good, evil, or really neutral has yet to be seen in the comic.
* WellIntentionedExtremist: At the start of the series, this is Kendra's most potential future as the leader of the Magical Girl Union. And the Union itself. She's genre savvy enough to quit while she's still sane.
** [[spoiler:Sadly, her best friend takes up the mantle. And doesn't quit after seeing Chrono's warnings.]]
* WordOfGod: After each chapter, Emily posts a page of commentary on the preceeding, as well as the occasional bit of worldbuilding on how her magical system works.