19th-century 19th-century-literature advanced-society advanced-technology adventure alien alien-civilization alien-civilizations alien-invasion alien-life alien-species alienation aliens allegory alternate-future alternate-history alternate-reality alternate-timeline alternative-history apocalyptic artificial-intelligence astronaut astronomy astrophysical-phenomena astrophysics biology british-literature capitalism cautionary cautionary-tale civilization class-divide class-division class-struggle classic classic-literature classics colonization disaster discovery dystopia dystopian dystopian-future dystopian-society earth eloi english-literature entropy epic epic-adventure escapism evolution evolutionary-theory existential existentialism exploration exploration-of-time extraterrestrial extraterrestrial-intelligence extraterrestrial-life fantasy fast-paced fear-of-progress fear-of-the-future fiction friendship future future-dystopia future-societies future-society future-technology future-world futurism futuristic futuristic-technology genetic-engineering global-catastrophe h.-g. h.-g.-wells h.g.-wells hope human-civilization human-condition human-evolution human-ingenuity human-nature human-progress human-resilience human-society humanity humanitys-destiny imagination imaginative industrial-revolution inequality intelligent-life interstellar interstellar-travel invention inventions isolation journey london loneliness machine machinery machines mathematical-puzzles microbial-life mission mission-to-mars moral-decay morality morlocks mystery nasa near-future neuroscience novella outer-space philosophical philosophical-ponderings philosophical-themes philosophy physics planetary-exploration planetary-science post-apocalyptic problem-solving progress prophecy protagonist sci-fi science science-and-technology science-fantasy science-fiction science-fiction-thriller scientific scientific-discovery scientific-ethics scientific-experiment scientific-experimentation scientific-experiments scientific-exploration scientific-invention scientific-inventions scientific-progress scientific-research scientific-speculation social-class social-commentary social-criticism social-critique social-darwinism social-hierarchy social-inequality societal-critique societal-decay society solar-system space space-adventure space-exploration space-mission space-travel spacecraft speculation speculative speculative-fiction speculative-technology steampunk survival suspense symbolism teamwork technological-advancement technological-advancements technological-exploration technological-innovation technology thought-provoking thriller thrilling time-machine time-manipulation time-paradox time-travel time-traveler utopia utopian-society victorian victorian-era victorian-literature victorian-society visionary warning wells wellsian worldbuilding