He wasn’t even supposed to last, let alone become one of the world’s most popular comic book characters. But that’s the thing about Wolverine. He doesn’t go down easily, and just when it seems like he’s on the ropes, he comes back swinging, even better than before. This can be chalked up to the character’s unique ability to evolve, and not simply evolution as the result of his mutant DNA. Rather, it is a result of the character’s history which has seen him as adversary, agent, samurai, X-Man, Avenger and Death itself. Despite his unbreakable adamantium skeleton, Wolverine is malleable, never simply a superhero, and as a result, he can…