Suppose an antidote was invented that "cured" something significant in your life. Not a disease like cancer or diabetes, but a trait that is part of who you are, for better or worse—like your body type or a personality defect. If you had the opportunity to change the way you were made, would you take it?
That's the intriguing premise that propels X-Men: The Last Stand, the third installment in the highly successful superhero series that began with 2000's X-Men and continued with X2: X-Men United in 2003. A cure has been developed that can genetically suppress the mutant gene, making them as "normal" as any other human being. The U.S. government gets on board through the facilitation of Dr. Hank McCoy, aka Beast (Kelsey Grammer), the Secretary of Mutant Affairs under the President and a former member of the X-Men, led by Professor Charles Xavier (Patrick Stewart).
The cure is met with great skepticism and debate, because after all, not all mutants are created equally. Having the power to heal rapidly (like Wolverine, played by Hugh Jackman) or to control the weather (Halle Berry as Storm) can be handy. Shedding blue fur (Beast) or being unable to touch people without harming them (Rogue, played by Anna Paquin), that's another matter. Hence, the reason the government insists that the cure is voluntary to any mutant willing to take it.
Long-time X-Men rival Magneto (Ian McKellen) sees it differently, insisting that the government is planning a form of ethnic cleansing and that mutants are superior to humans—that they should be proud of who they are, not ashamed. He immediately rallies other like-minded mutants to his cause, forming a Brotherhood intent on eradicating the cure … and, perhaps, mankind with it. ...1