19th-century 19th-century-literature action advanced-technology adventure alien-civilization alien-invasion alien-life alien-species aliens allegory alternate-history alternate-reality apocalyptic artificial-intelligence astronaut astronomy astrophysics battle battle-school betrayal biology british-literature brotherhood bullying cautionary-tale child-prodigy children civilization class-divide class-division class-struggle classic classic-literature classics colonization coming-of-age compassion competition deception destiny discovery dystopia dystopian dystopian-future dystopian-society earth eloi empathy ender-wiggin escapism ethical-dilemmas ethics evolution evolutionary-theory existentialism exploration extraterrestrial extraterrestrial-intelligence extraterrestrial-life fantasy fear friendship future future-societies future-society future-technology futurism futuristic futuristic-society futuristic-technology games gaming genetic-engineering genius genocide government government-conspiracy government-control government-manipulation h.-g. h.-g.-wells h.g.-wells human-civilization human-evolution human-nature human-progress humanity identity imagination imaginative industrial-revolution intelligence interstellar interstellar-travel interstellar-war invention isolation leadership london loneliness loyalty machine machines manipulation military military-strategy military-training mind-games mission mission-to-mars moral-ambiguity moral-dilemma moral-dilemmas morality morlocks mystery nasa outer-space philosophical philosophical-themes philosophy physics planetary-science post-apocalyptic problem-solving progress protagonist psychological psychological-manipulation psychological-warfare psychology sacrifice school sci-fi science science-and-technology science-fantasy science-fiction scientific-discovery scientific-ethics scientific-exploration scientific-invention scientific-inventions sibling-relationships sibling-rivalry social-class social-commentary social-criticism social-critique social-hierarchy social-inequality societal-decay society solar-system space space-battles space-exploration space-mission space-opera space-travel space-warfare spacecraft speculative-fiction strategic-thinking strategy survival suspense teamwork technological-advancement technological-advancements technological-innovation technology telepathy thought-provoking thriller thrilling time-dilation time-machine time-manipulation time-paradox time-travel time-traveler training trust utopia utopian-society victorian victorian-era victorian-literature video-games virtual-reality visionary war war-games wells xenocide xenophobia young-adult