Although the full history of this universe is unknown, it is presumably more-or-less the same as Earth-616 up until a certain point whereupon a series of apocalyptic 'mutant wars' broke out, which were so destructive that the Earth was almost destroyed and the mutant race apparently made all but extinct. Following this, Reed Richards and the other members of the Fantastic Four led the other superheroes in rebuilding the world, consequently transforming it into a techno-utopia. The Sol system was willingly quarantined by Earth to avoid galactic interference. In this contained system, humans have spread to virtually every planet in the solar system, with crime and super-villains almost a thing of the past.
- 100 characters that originate from Earth-71166
- 5 teams that originate from Earth-71166
- 3 organizations that originate from Earth-71166
- 8 appearance(s) of Earth-71166
- 130 image(s) of Earth-71166