Cyberpunk is a subgenre of science fiction in a dystopian futuristic setting said to focus on a combination of "low-life and high tech". It features futuristic technological and scientific achievements, such as artificial intelligence and cyberware, juxtaposed with societal collapse, dystopia or decay. Much of cyberpunk is rooted in the New Wave science fiction movement of the 1960s and 1970s, when writers like Philip K. Dick, Michael Moorcock, Roger Zelazny, John Brunner, J. G. Ballard, Philip José Farmer and Harlan Ellison examined the impact of drug culture, technology, and the sexual revolution while avoiding the utopian tendencies of earlier science fiction.
Feminist science fiction is a subgenre of science fiction focused on such feminist themes as: gender inequality, sexuality, race, economics, reproduction, and environment. Feminist SF is political because of its tendency to critique the dominant culture. Some of the most notable feminist science fiction works have illustrated these themes using utopias to explore a society in which gender differences or gender power imbalances do not exist, or dystopias to explore worlds in which gender inequalities are intensified, thus asserting a need for feminist work to continue.
Science fiction and fantasy serve as important vehicles for feminist thought, particularly as bridges between theory and practice. No other genres so actively invite representations of the ultimate goals of feminism: worlds free of sexism, worlds in which women's contributions are recognized and valued, worlds that explore the diversity of women's desire and sexuality, and worlds that move beyond gender.
Kim Stanley Robinson is an American science fiction writer best known for his Mars trilogy. Many of his novels and stories have ecological, cultural, and political themes and feature scientists as heroes. Robinson has won numerous awards, including the Hugo Award for Best Novel, the Nebula Award for Best Novel and the World Fantasy Award. The Atlantic has called Robinson's work "the gold standard of realistic, and highly literary, science-fiction writing." According to an article in The New Yorker, Robinson is "generally acknowledged as one of the greatest living science-fiction writers."
Robert Anson Heinlein was an American science fiction author, aeronautical engineer, and naval officer. Sometimes called the "dean of science fiction writers", he was among the first to emphasize scientific accuracy in his fiction, and was thus a pioneer of the subgenre of hard science fiction. His published works, both fiction and non-fiction, express admiration for competence and emphasize the value of critical thinking. His plots often posed provocative situations which challenged conventional social mores. His work continues to have an influence on the science-fiction genre, and on modern culture more generally.
The Time Machine is an 1895 dystopian post-apocalyptic science fiction novella by H. G. Wells about a Victorian scientist known as the Time Traveller who travels approximately 802,701 years into the future. The work is generally credited with the popularization of the concept of time travel by using a vehicle or device to travel purposely and selectively forward or backward through time. The term "time machine", coined by Wells, is now almost universally used to refer to such a vehicle or device.
A utopia typically describes an imaginary community or society that possesses highly desirable or near-perfect qualities for its members. It was coined by Sir Thomas More for his 1516 book Utopia, which describes a fictional island society in the New World.
Utopian and dystopian fiction are subgenres of science fiction that explore social and political structures. Utopian fiction portrays a setting that agrees with the author's ethos, having various attributes of another reality intended to appeal to readers. Dystopian fiction offers the opposite: the portrayal of a setting that completely disagrees with the author's ethos. Some novels combine both genres, often as a metaphor for the different directions humanity can take depending on its choices, ending up with one of two possible futures. Both utopias and dystopias are commonly found in science fiction and other types of speculative fiction.
Reginald Bretnor was an American science fiction author who flourished between the 1950s and 1980s. Most of his fiction was in short story form, and usually featured a whimsical story line or ironic plot twist. He also wrote on military theory and public affairs, and edited some of the earliest books to consider SF from a literary theory and criticism perspective.
Military science fiction is a subgenre of science fiction and military fiction that depicts the use of science fiction technology, including spaceships and weapons, for military purposes and usually principal characters who are members of a military organization, usually during a war; occurring sometimes in outer space or on a different planet or planets. It exists in a range of media, including literature, comics, film, television and video games.
Since the advent of the cyberpunk genre, a number of cyberpunk derivatives have become recognized in their own right as distinct subgenres in speculative fiction, especially in science fiction. Rather than necessarily sharing the digitally and mechanically focused setting of cyberpunk, these derivatives can display other futuristic, or even retrofuturistic, qualities that are drawn from or analogous to cyberpunk: a world built on one particular technology that is extrapolated to a highly sophisticated level, a gritty transreal urban style, or a particular approach to social themes.
The literary genre of science fiction is diverse, and its exact definition remains a contested question among both scholars and devotees. This lack of consensus is reflected in debates about the genre's history, particularly over determining its exact origins. There are two broad camps of thought, one that identifies the genre's roots in early fantastical works such as the Sumerian Epic of Gilgamesh. A second approach argues that science fiction only became possible sometime between the 17th and early 19th centuries, following the scientific revolution and major discoveries in astronomy, physics, and mathematics.
Tech noir is a hybrid genre of fiction, particularly film, combining film noir and science fiction, epitomized by Ridley Scott's Blade Runner (1982) and James Cameron's The Terminator (1984). The tech-noir presents "technology as a destructive and dystopian force that threatens every aspect of our reality".
Artificial intelligence is a recurrent theme in science fiction, whether utopian, emphasising the potential benefits, or dystopian, emphasising the dangers.
A dystopia, also called a cacotopia or anti-utopia, is a community or society that is extremely bad or frightening. It is often treated as an antonym of utopia, a term that was coined by Sir Thomas More and figures as the title of his best known work, published in 1516, which created a blueprint for an ideal society with minimal crime, violence, and poverty. The relationship between utopia and dystopia is in actuality, not one of simple opposition, as many dystopias claim to be utopias and vice versa.
Soft science fiction, or soft SF, is a category of science fiction with two different definitions, in contrast to hard science fiction. It explores the "soft" sciences, as opposed to the "hard" sciences. It can also refer to science fiction which prioritizes human emotions over scientific accuracy or plausibility.
The following outline is provided as an overview of and topical guide to science fiction:
Solarpunk is a literary and artistic movement, close to the hopepunk movement, that envisions and works toward actualizing a sustainable future interconnected with nature and community. The "solar" represents solar energy as a renewable energy source and an optimistic vision of the future that rejects climate doomerism, while the "punk" refers to do it yourself and the countercultural, post-capitalist, and sometimes decolonial aspects of creating such a future.
The far future has been used as a setting in many works of science fiction. The far future setting arose in the late 19th century, as earlier writers had little understanding of concepts such as deep time and its implications for the nature of humankind. Classic examples of this genre include works such as H.G. Wells' The Time Machine (1895) or Olaf Stapledon's Last and First Men (1930). Recurring themes include themes such as Utopias, eschatology or the ultimate fate of the universe. Many works also overlap with other genres such as space opera, science fantasy or apocalyptic and post-apocalyptic fiction.
The near future has been used as a setting in many works, usually but not limited to the genre of science fiction. It has become increasingly common in works from the 18th century onward, with some of the classic works in the genre being Jules Verne's Journey to the Centre of the Earth (1864) and H. G. Wells' The War of the Worlds (1898). 20th century saw works such as George Orwell's Nineteen Eighty-Four (1949) or the novels of William Gibson, the latter representing the emergence of the popular cyberpunk genre. While some, particularly early, works of this genre are optimistic showcases of technological and societal progress, many others are discussing emergent social problems such as environmental problems, overpopulation, oppressive political regimes or the possibility of a nuclear holocaust.
Sumer- A short social science fiction film. 
