10 Classic X-Men Comics Every Marvel Fan Should Read

Before Wolverine, Storm, Nightcrawler and Colossus joined the team, the X-Men were five teenagers learning how to use their powers under the guidance of Professor Charles Xavier. That original comic did not become an immediate hit—but it created the mutant corner of the Marvel Universe we still love today.

Marvel stopped publishing new X-Men stories in 1970, and the series survived through reprints until Giant-Size X-Men #1 launched a new international lineup in 1975. Because that relaunch became legendary, fans sometimes treat the original run like a failed first draft. That is a mistake. These early comics gave us Magneto, Juggernaut, the Sentinels, the Brotherhood of Evil Mutants and the Savage Land.

So grab your Cerebro helmet and prepare to head back to the Silver Age. Here are 10 original X-Men comics every Marvel fan should know—ranked from historic debut to must-read classic.

10. The X-Men #1 Started the Mutant Revolution

The X-Men #1 (1963)

You cannot tell the story of the X-Men without starting here. Stan Lee and Jack Kirby introduce Professor Charles Xavier and his original students: Cyclops, Beast, Angel and Iceman. Jean Grey—then known as Marvel Girl—arrives as the newest member of the team.

The young heroes are quickly sent on their first mission when Magneto seizes control of Cape Citadel, a military base in Florida. Using his magnetic powers, he turns the base’s weapons against its personnel and threatens the surrounding area. The X-Men intervene, and Cyclops eventually forces Magneto to expend enough energy that he retreats.

Yes, some of the dialogue feels very Silver Age, and Magneto even escapes with a jetpack. But this one comic created Xavier’s school, the original team and one of Marvel’s greatest villains. That makes it required reading for any serious X-Men fan.

juggernaut

9. The X-Men #12 Unleashed the Juggernaut

The X-Men #12 (1965)

Nothing says family drama like your unstoppable stepbrother smashing his way into your mansion. The X-Men #12 introduces Juggernaut while revealing the painful history Charles Xavier tried to leave behind.

After Xavier’s father died, his mother married fellow scientist Kurt Marko. Kurt was an abusive stepfather, while his son, Cain Marko, developed a bitter rivalry with Charles. Years later, while serving together during the Korean War, Cain discovered a mystical ruby that transformed him into the immensely powerful Juggernaut.

The issue treats Juggernaut almost like a horror-movie monster, keeping him partly hidden as he crashes through one defense after another. The final reveal of his costume makes for a terrific cliffhanger—and proves that the X-Men’s most dangerous battles can begin inside Xavier’s own family.

8. The X-Men #10 Sent the Mutants Into a World of Dinosaurs

The X-Men #10 (1965)

X-Men plus dinosaurs—what more could a comic fan want? While investigating reports of a wild man in Antarctica, the team discovers the Savage Land, a hidden prehistoric jungle filled with dinosaurs and other creatures that should have disappeared millions of years ago.

The team also encounters Ka-Zar and his sabertooth companion, Zabu. Although an earlier version of Ka-Zar existed outside Marvel’s superhero universe, this issue introduced the character who would become part of Marvel’s main continuity.

Ka-Zar joins the X-Men in rescuing Angel and Marvel Girl after they are kidnapped and threatened with sacrifice to a Tyrannosaurus rex. After the rescue, he uses the Savage Land’s mastodons to seal its entrance in an effort to protect his home from outsiders.

Of course, sealing the entrance does not keep Marvel’s heroes away for long. The X-Men return to the Savage Land again and again, turning this strange dinosaur kingdom into one of the coolest locations in Marvel Comics.

7. The X-Men #9 Gave Fans X-Men Versus Avengers

The X-Men #9 (1965)

Long before Avengers vs. X-Men became a major Marvel event, the two teams were already fighting over a misunderstanding. Their complicated relationship begins in The X-Men #9.

Professor Xavier tracks his enemy Lucifer to a cave in the Balkans, where the villain has connected a thermal bomb to his heartbeat. The device creates seismic disturbances that draw the Avengers to the area. When Earth’s Mightiest Heroes encounter the X-Men, each team mistakenly believes the other is interfering with its mission.

The misunderstanding leads to the hero-versus-hero action fans expect from a Marvel crossover. Xavier eventually disarms the bomb and defeats Lucifer, allowing both teams to realize that they were never true enemies.

It may not be their greatest battle, but it is the first—and it confirms that Xavier’s mutants belong to a much bigger Marvel Universe.

6. The X-Men #39 Finally Gave the Team Individual Style

The X-Men #39 (1967)

The matching blue-and-yellow uniforms are iconic, but they made the original X-Men look more like students than individual superheroes. The X-Men #39 finally lets every member show some personality.

Cyclops remained closest to the original design, wearing a streamlined blue suit with yellow trunks. Angel adopted a red-and-yellow color scheme and a redesigned mask. Beast added red elements to his costume, while Jean Grey received the most dramatic transformation with a green-and-yellow outfit and a new mask. Iceman’s updated gloves, boots and X-branded belt completed the team’s new appearance.

These redesigns were more than a fashion upgrade. They showed that Xavier’s students were becoming heroes with identities of their own—a tradition that continues every time the X-Men receive another costume makeover.

5. The X-Men #14 Introduced the Mutant-Hunting Sentinels

The X-Men #14 (1965)

If you hear the word “Sentinel,” you probably picture a giant purple robot trying to destroy the X-Men. Those mutant-hunting machines make their terrifying debut in The X-Men #14—and immediately become much more than another villain for the team to punch.

During a televised debate with Professor Xavier, anthropologist Bolivar Trask warns the public about a supposed “mutant menace.” He presents the Sentinels as machines designed to locate and control mutants—but the robots quickly turn against their creator and take him captive. By declaring themselves superior to humanity, the Sentinels force Trask to confront the destructive consequences of his own fear.

This begins a three-part story that turns the Sentinels into a threat to mutants and humans alike. More importantly, it brings the X-Men’s central theme into focus: these heroes risk their lives to protect a world that is afraid of them.

4. The X-Men #35 Put Spider-Man Against the X-Men

The X-Men #35 (1967)

“Beware the spider.” That incomplete warning is all it takes to put Spider-Man on a collision course with the X-Men. Banshee is actually warning the team about a robotic spider, but Xavier’s students naturally suspect Marvel’s famous wall-crawler.

Spider-Man destroys the robot while visiting Westchester, and Cerebro detects its energy near him. The X-Men naturally assume that Spider-Man is the threat Banshee warned them about, resulting in another classic Marvel misunderstanding and a short battle.

Spider-Man holds his own against Xavier’s students until both sides realize their mistake. Jean Grey then locates Banshee, allowing the X-Men to turn their attention toward rescuing him.

The fight does not last long, but watching Spider-Man hold his own against the entire team makes this an entertaining early crossover. Spidey and the mutants would share many more adventures, but the confusion started here.

3. The X-Men #66 Ended an Era With the Hulk

The X-Men #66 (1970)

How do you close the original era of the X-Men? By sending the team after the Hulk. The X-Men #66 was the final issue to feature a new story before the title entered its reprint period.

Professor Xavier falls into a coma after exhausting his mental powers. When Jean Grey and Beast examine his mind, they discover that his thoughts are focused on the Hulk. Several members travel to Las Vegas, where the Hulk is rampaging, while others remain behind to watch over Xavier.

Jean briefly calms the Hulk and helps him return to Bruce Banner, but the arrival of the military triggers another transformation. The team eventually learns that Banner and Xavier once created a gamma-ray device capable of treating mental exhaustion. After narrowly escaping the Hulk, the X-Men return to the mansion and use the device to revive their mentor.

It was a strange but memorable way to close the book on the original team. Five years later, Giant-Size X-Men #1 would introduce the international lineup that changed the franchise forever.

2. The X-Men #4 Created the Brotherhood’s Mutant Rivalry

The X-Men #4 (1964)

Magneto was dangerous on his own, but The X-Men #4 gave him an entire team. The “Brotherhood of Evil Mutants” is not exactly a subtle name, but its original roster helped reshape Marvel history.

The original Brotherhood included Quicksilver, Scarlet Witch, Mastermind and Toad. Quicksilver and Scarlet Witch were not committed villains; they served Magneto because he had rescued Wanda from an angry mob. Their discomfort with his methods created tension inside the group and hinted that their futures could take a different direction.

This battle launches a rivalry Marvel has reinvented countless times. Brotherhood members would switch sides, join other teams and become heroes in their own right, but it all begins with Magneto challenging Xavier’s dream.

1. The X-Men #57 Delivered the Original Run’s Best Story

The X-Men #57 (1969)

If you want to see the moment the original series started looking and feeling like the X-Men comics that followed, read The X-Men #57. Roy Thomas and Neal Adams bring sharper storytelling, dynamic artwork and a new Sentinel threat to the title.

After the Sentinels kidnap Lorna Dane, Beast and Iceman return to New York while the other X-Men remain in Egypt dealing with the Living Pharaoh. They discover that Larry Trask, Bolivar Trask’s son, has reactivated the Sentinel program and sent the robots to capture mutants.

The story develops across three issues and eventually reveals a powerful irony: Larry himself is a mutant. Once again, the Sentinels turn against the Trask commanding them, proving that a system created to target an entire group cannot safely distinguish between its creator’s prejudices and reality.

Thomas and Adams combine superhero spectacle with the persecution, identity and social conflict that later creators would make central to the franchise. This story points directly toward the X-Men’s future, earning The X-Men #57 the top spot on our list.

Welcome to the Original Mutant Era

The original series never achieved the popularity of the era that followed Giant-Size X-Men #1, but sales do not tell the whole story. These comics created the heroes, villains, locations and mutant conflicts that later writers transformed into one of Marvel’s greatest franchises.

Some of the dialogue is dated and a few plots are undeniably goofy—but that is part of the Silver Age fun. If you want to understand how the X-Men became a cultural phenomenon, these 10 issues are the perfect place to begin.

Which original X-Men comic belongs at number one? Let us know—and keep it locked to Your Nerd Side for more comic-book history, superhero news and everything nerdy.