As an aspiring writer in the science fiction genre, you are presented with limitless possibilities. However, while there are so many themes that you could write on, there are some popular themes have repeatedly proven to be the most successful. Given that there are potentially hundreds of themes to choose from, I have compiled ten of the most popular science fiction themes found in modern science fiction.
End of Humanity
Sometimes referred to as post-apocalyptic or apocalyptic fiction, this genre is set in a world in which the technological civilization of the Planet Earth is collapsing either due to manmade or natural phenomenon such as depletion of resources or a nuclear holocaust, fictional happenings such as an alien invasion or zombie apocalypse, or an eschatological happening such as the Second Coming.
The desire to achieve immortality is a popular theme in science fiction. The major themes typically involve aspects of mind uploading where one uploads their consciousness into a computer or digital equivalent; Digital immortality where the person’s personality is uploaded on digital media including their thoughts and memories, which continue to live in perpetuity; and cryonics where a dead person is preserved until human technology develops to the point of bringing them back to life.
An Alien invasion is one of the oldest themes that has been a favorite of science fiction fans. Alien invasion typically involves the visit of extraterrestrials to Earth usually in the form of an invasion that is intended to supplant or exterminate human life. This could take the form of stealing of resources, enslavement of the human population, or in some instances the destruction of the planet.
One of the most popular sub-genres particularly in literary science fiction. A parallel universe refers to a different world where an alternate reality that may or may not be a variant of the Earth exists. Such universes may have some differences from our current reality such as having different laws of physics or biology. The parallel universe is thus a crossroads between the planet Earth and a fantasy world.
This theme refers to several subgenres that may include genetic engineering, cloning, and biohacking. Genetic engineering themes tend to involve the creation of a super race of humans through technologies such as brain-computer interfacing, nanotechnology, and eugenics. From the opposing direction, is biohacking, in which individual person transform their bodies by introducing chemicals or cybernetic devices. Prosthetics or the use of robotics for enhanced bodily function also falls in this category
While closely related to bodily transformation this is a different subgenre of science fiction. The acquisition of superpowers typically encompasses aspects of teleportation, psychic phenomena, and enhanced mental function. Teleportation is the ability to transport persons or objects from one location to another without necessarily making use of the physical space between them. Psychic phenomena may include persons who have telekinetic, telepathic, precognitive and clairvoyant abilities. An enhanced mental function may include mind uploading, higher memory, mind-swap, and mind control abilities.
Time travel is one of the original and most popular themes popularized by novels such as “The Time Machine” by HG Wells. As a science fiction theme, it involves the movement of persons or objects between two points in space that typically has one going back to an earlier era or going forward to a future era. For instance, one could travel back in time to the Roman first century AD or go forward in time to the technologically driven world of 2100.
Military conflict is a common trope in many modern science fiction movies and literature. This will typically involve interstellar travel and combat in space between armies of antagonists from different planets or galaxies. These types of conflicts normally make use of exotic and strange weapons though some weapons used in science fiction have found use in conventional militaries.
Ever since science fiction franchise “Star Trek” became a mass phenomenon and gained acceptance even out of the science fiction community, the theme of Galactic Empires in science fiction has grown in leaps and bounds. The writing of this theme is modeled along the lines of the decline or rise of an empire that has significant technological advancement as compared to human civilizations or other civilizations in its vicinity. Given the differences in technology, social and economic advancement, there is tension between empires which usually results in conflict.
As an aspiring writer, you could write in any of the science fiction overarching themes we have discussed and been relatively successful. Nonetheless, you can always dig deeper into the subgenres of science fiction and still find success as long as you can write something that captures the imagination of the reader. This is by no means a complete listing of all the overarching themes, but rather an exposition of the most popular ones that I have found to have a higher probability of success with audiences.