19th-century advanced-technology adventure african-american african-american-experience african-american-literature alien-civilizations alienation allegory alternate-history alternate-reality american-dream american-history american-literature anarchism anarchist anti-fascism apocalyptic assimilation authoritarianism autobiographical autobiography barcelona battle betrayal bildungsroman black-culture black-experience black-identity blindness british-literature brotherhood catalonia catalonia-independence cautionary-tale civil-rights civil-rights-movement civil-war civilization class-divide class-division classic classic-literature classics coming-of-age communism conflict conformity democracy discrimination disillusionment dystopia dystopian dystopian-future dystopian-society eloi escapism european-history evolution evolutionary-theory existentialism exploration fantasy fascism first-hand-account foreign-correspondent freedom future future-society future-technology futurism futuristic futuristic-technology george-orwell h.-g.-wells h.g.-wells harlem harlem-renaissance historical historical-account history homage-to-catalonia human-evolution human-nature humanity idealism identity identity-crisis imagination imaginative individualism individuality inequality injustice international-brigades invention invisibility invisible invisible-man isolation jazz journalism loyalty machine machines memoir militarism military militia modernism morality morlocks nationalism non-fiction nonfiction oppression orwell personal-experience personal-freedom personal-narrative philosophical philosophical-themes philosophy political political-activism political-commentary political-conflict political-ideologies political-ideology political-memoir politics post-apocalyptic poum power power-dynamics prejudice progress propaganda protagonist protest race racism ralph-ellison rebellion republican republicanism resistance revolution revolutionary science science-and-technology science-fantasy science-fiction scientific-discovery scientific-ethics scientific-exploration scientific-invention segregation self-discovery social-class social-commentary social-criticism social-critique social-hierarchy social-inequality social-injustice social-justice socialism societal-critique societal-decay society southern-united-states spain spanish-civil-war speculative-fiction stereotypes surrealism survival symbolism technological-advancement technological-advancements technological-innovation technology thought-provoking time-dilation time-machine time-manipulation time-paradox time-travel time-traveler totalitarianism underground utopia victorian victorian-era victorian-literature visionary war war-correspondent war-journalism