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John Wood Campbell, Jr. (June 8, 1910 - July 11, 1971) was an influential figure in American science fiction. As editor of Astounding Science Fiction (later called Analog Science Fiction and Fact), from late 1937 until his death, he is generally credited with shaping the so-called Golden Age of Science Fiction. "The Last Evolution" was originally published in the August 1932 issue of "Amazing Stories" magazine.Pages of The Last Evolution :