Diaspora (novel)
A posthuman novel of speciation, diaspora, and cosmic discovery.
Diaspora is a hard science fiction novel by the Australian writer Greg Egan, first published in print in 1997. It originated as the short story 'Wang's Carpets', which appeared in the Greg Bear-edited anthology New Legends (1995) and later became a chapter of the novel. The work explores posthuman themes, including the nature of life and intelligence after humanity has speciated into three distinct groupings: fleshers, gleisner robots, and citizens living in simulated realities.
Quick Facts
- Author
- Greg Egan
- Country
- Australia
- Language
- English
- Genre
- Hard science fiction
- Publisher
- Millennium
- Release Date
- September 1997
- Media Type
- Print (paperback)
- Pages
- 376 (PB edition)
- Isbn
- 0-7528-0925-3
- Oclc
- 39837889
Facts from the source article.
Lore & Background
The novel is set in a posthuman future where transhumanism became the default philosophy in the mid 21st century. By 2975 CE, humanity has diverged into fleshers (biological humans, including statics and exuberant derivatives), gleisner robots (software-based intelligences in anthropoid bodies), and citizens (disembodied software running in simulated polises). Most characters use gender-neutral pronouns from Keri Hulme. The plot begins with the orphanogenesis of Yatima, a citizen born without ancestors in Konishi polis. Years later, a binary neutron star collapse in Lacerta releases a gamma ray burst that strips Earth's ozone layer and causes radiation damage, leading to mass extinction. The gleisners and Coalition of Polises survive. The titular Diaspora is a quest by most inhabitants of Carter-Zimmerman polis, deploying one thousand clones of the polis toward specific nearby stars to gather data and revise Kozuch Theory, which had failed to predict the event.
Reader's Guide
Diaspora is significant for its rigorous extrapolation of posthuman possibilities, particularly the speciation of humanity into biological, robotic, and virtual forms. It questions the meaning of life and desire when biology no longer constrains existence. The novel's treatment of Kozuch Theory—a fictional physics paradigm treating particles as six-dimensional wormholes—exemplifies Egan's commitment to inventing plausible scientific frameworks. The work also addresses themes of empathy and responsibility, as citizens and gleisners attempt to rescue surviving fleshers after the Lacerta event. Its legacy lies in its influence on hard science fiction and transhumanist thought, offering a nuanced exploration of identity, consciousness, and the purpose of exploration in a universe of limitless virtual and physical possibilities.
Did You Know?
- The novel originated as the short story 'Wang's Carpets', which appeared in the anthology New Legends edited by Greg Bear.
- Most characters use gender-neutral pronouns 've', 'vis', and 'ver' from Keri Hulme.
- The gamma ray burst that strips Earth's ozone layer and causes radiation damage was caused by a binary neutron star collapse in the constellation Lacerta.
- The Diaspora consists of one thousand clones of Carter-Zimmerman polis deployed toward specific nearby stars.
Frequently Asked Questions
Who wrote Diaspora and when was it published?
Greg Egan, an Australian hard science fiction writer, published Diaspora in 1997. The novel evolved from his 1995 short story 'Wang's Carpets,' which appeared in the New Legends anthology edited by Greg Bear.
What are the three posthuman groups in Diaspora?
By the year 2975, humanity has split into fleshers (biological humans), Gleisners (robotic minds that departed Earth), and citizens (consciousnesses inhabiting simulated realities). The novel uses these three lineages to explore what speciation means after the original species has effectively ended.
What is the Kozuch Theory in the novel?
The Kozuch Theory is a speculative framework Egan introduces to argue that intelligence and life can arise in radically new forms unbound from carbon biology. It serves as the philosophical backbone for why the three posthuman groups should be treated as genuinely separate species rather than mere technological variants.
Why is Diaspora considered significant in Australian science fiction?
It is often cited as one of Australia's most intellectually dense hard-SF novels, weaving quantum mechanics, posthuman philosophy, and the concept of orphanogenesis (the spontaneous origin of new life forms) into a single narrative. Its 1997 publication helped establish Egan as a leading voice in speculative fiction beyond the anglophone mainstream.
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