

While Thanos and the Infinity Gems (they’re stones in the movies, gems in the comics) have appeared in plenty of Marvel comics since writer/artist Jim Starlin created the villain in an early 1970s issue of Iron Man, the comics story that seems to have influenced Marvel Studios’ mega-story the most is the 1991 crossover Infinity Gauntlet (although its sequel Infinity War is where the new Avengers movie actually gets its subtitle). The binding threads have been the villain Thanos, who briefly appeared in the two previous Avengers movies and the first Guardians of The Galaxy movie, and the Infinity Stones, brightly colored baubles that served as the maguffins or Easter eggs in many of the films.

While the script was hardly written-or even imagined-way back when the first Iron Man film opened, the building of a cohesive, coherent Marvel Cinematic Universe which would eventually all come into play in a single epic film has been evident for a long time. As the people handling the marketing for the film were only too eager to share, when Avengers: Infinity War opened a few weeks ago, it was the culmination of some ten years and 18 films worth of build-up.
