This is a science-fiction story. History is a science; the other part is the most fictional field we have today.
Randall Garrett (December 16, 1927 - December 31, 1987) was an American science fiction and fantasy author. He was a prolific contributor to Astounding and other science fiction magazines of the 1950s and 1960s. He instructed Robert Silverberg in the techniques of selling large quantities of action-adventure science fiction, and collaborated with him on two novels about Earth bringing civilization to an alien planet.