Speculative Fiction

Speculative fiction is a fiction genre speculating about worlds that are unlike the real world in various important ways. In these contexts, it generally overlaps one or more of the following: science fiction, fantasy fiction, horror fiction, supernatural fiction, superhero fiction, utopian and dystopian fiction, apocalyptic and post-apocalyptic fiction, and alternate history.

The term is used this way in academic and ideological criticism of these genres, as well as by some readers, writers, and editors of these genres.

Science fiction is a genre of fiction. It differs from fantasy in that, within the context of the story, its imaginary elements are largely possible within scientifically established or scientifically postulated laws of nature (though some elements in a story might still be pure imaginative speculation). Exploring the consequences of such differences is the traditional purpose of science fiction, making it a "literature of ideas". Science fiction is largely based on writing rationally about alternative possibilities. The settings for science fiction are often contrary to known reality.

These may include:

*A setting in the future, in alternative timelines, or in a historical past that contradicts known facts of history or the archaeological record

*A setting in outer space, on other worlds,...