Twenty years ago today, Bryan Singer’s X-Men arrived in theaters and it’s not hyperbole to call it one of the most influential pictures of the 21st century. The 20th Century Fox release found the comic book genre at a rather low point at the end of that said century. While Blade was a nice size hit in 1998, the years prior found at a lot to be desired with the quality of the genre. 1995 brought us Judge Dredd and 1997 saw the release of Batman and Robin, which found the Caped Crusader with Bat nipples and bad reviews.

X-Men, though it’s hard to remember now, was released at a time where the idea of superhero tales was an uncertain box office prospect. This is two years before Spider-Man broke all kinds of financial records. This is five years prior to Christopher Nolan reinvigorating the Bat franchise with his Dark Knight trilogy. And this was eight years before Robert Downey Jr. was cast as Tony Stark/Iron Man, officially kicking off the Marvel Cinematic Universe.

In the summer of 2000, X-Men was by no means a guaranteed hit. It did, however, have credibility with the behind the scenes talent and cast. Bryan Singer was known for his heralded The Usual Suspects. Acclaimed actors Patrick Stewart, Ian McKellen (fresh off an Oscar nod for Gods and Monsters), Anna Paquin, and Halle Berry were among the onscreen players. And it was another casting decision that provided its most enduring legacy. Russell Crowe, who headlined that summer’s Oscar winner Gladiator, originally turned down the part of Wolverine. Dougray Scott was then cast in the role, but had to drop out when his role as the villain in Mission: Impossible II (also out that summer) prevented him from filming. So it was the unknown Hugh Jackman who donned the claws. He would go on to make it his signature role as he played Logan/Wolverine in numerous sequels and spin-offs (including three stand-alone projects of wildly divergent qualities).

Let’s back up. Before the 2000 release, X-Men was in development for over a decade and a half. At one point, James Cameron was slated to produce with his then wife Kathryn Bigelow attached to direct. Later on, Robert Rodriguez turned the project down. A gander at the pic’s Wikipedia page is an entertaining read (Mariah Carey was in the mix for Storm at one juncture and Angela Bassett was first choice). X-Men was rushed to make its summer release date 20 years ago today after it was originally intended for Christmas 2000.

That rushed feeling does show on up on screen a little, but the overall end result speaks for itself. What occurred two decades ago is a major mark in the comic book movie renaissance that continues to this day. The franchise has certainly had its ups and downs. X2: X-Men United was the first sequel in 2003 and it is generally considered a high point. Three years later, Brett Ratner took over directorial reigns with The Last Stand and (while a huge hit) the quality took a dip. Matthew Vaughn would reestablish critical kudos in rebooting the series in 2011 with First Class (bringing Michael Fassbender, James McAvoy, and Jennifer Lawrence to the screen playing younger counterparts to key characters). Jackman’s first spin-off X-Men Origins: Wolverine faced deserved backlash while 2017’s Logan was lauded and landed an Adapted Screenplay Oscar nomination. And a cheeky and R rated offshoot called Deadpool with Ryan Reynolds would dazzle audiences and critics alike. Last summer’s Dark Phoenix didn’t do any dazzling and was another low ebb in the series. Spin-off The New Mutants has seen release date changes that began in 2018 and it’s pretty much a running joke as to whether it will ever come out.

That long road began in 2000 and has shaped the cinematic universe since. And if you had to mark a spot for the comic book landscape today as it stands now on the screen, it started that day.