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Related: VMAs 2015: the MTV Video Music Awards – as it happened The story is Ray Bradbury’s The Toynbee Convector, and it goes like this: a time traveler appears bearing news of an improved future, where prosperous and satisfied humans live peacefully in harmony with nature.

In one story in his 1988 collection “The Toynbee Convector,” a ghost grows pale and ill when surrounded by cynics and intellectuals but begins to revive when a group of children gather, avowing their belief in him, much the way Tinkerbell was resuscitated in “Peter Pan” by the audience’s applause.