Avengers take issue with Magneto's placement among the heroic team by The Beyonder, the X-Men defend him as an ally, despite disagreeing with his methods. Pulitzer-winning national security journalist Spencer Ackerman has stated that "the importance of the X-Men as a universe of stories, as a mythos, is that we should always be debating who is right." Setting The X-Men exist in the Marvel Universe along with other characters featured in Marvel Comics series and often interact with them. The X-Men/mutant corner of the Marvel Universe has been informally called "X-Universe". For instance, Wolverine was an antagonist to the Hulk before joining the X-Men and has ties to other heroes such as Captain America, Black Widow, the Thing, Captain Marvel (Carol Danvers), Elektra and Spider-Man. Quicksilver and Scarlet Witch are former Brotherhood of Mutants members who joined the Avengers, as have other X-Men characters such as Beast. Rogue got her powers via absorbing Carol Danvers (then called Ms. Marvel) who has also interacted with the X-Men. Kitty Pryde/Shadowcat has been part of the Guardians of the Galaxy and dated Star-Lord, she also served as a mentor to Franklin Richards the mutant son of Mister Fantastic and Invisible Woman of the Fantastic Four. Storm was once the Queen of Wakanda and the wife of Black Panther, as well as a temporary member of the Fantastic Four. Rachel Summers was the girlfriend of Franklin Richards. Iceman and Angel have also joined the original Champions alongside Black Widow, Ghost Rider and Hercules as well as having frequent partnerships with Firestar and Spider-Man as "The Amazing Friends". Sabretooth was an Iron Fist villain before becoming Wolverine's archenemesis. And both the X-Men and the Avengers formed a team called Uncanny Avengers (aka Avengers Unity Division) after a conflict over the Phoenix Force. The global nature of the mutant concept means the scale of stories can be highly varied. The X-Men's enemies range from mutant thieves to galactic threats. Historically, the X-Men have been based in the Xavier Institute of Gifted Youngsters/X-Mansion located in Salem Center, Westchester County, New York, and are often portrayed as a family. The Xavier's School for Gifted Youngsters/X-Mansion is often depicted with three floors and two underground levels. To the outside world, it acted as a higher learning institute until the 2000s, when Xavier was publicly exposed as a mutant at which point it became a known mutant boarding school. Xavier