Novelette
Invaders
- by John Kessel
- Magazine of Fantasy and Science Fiction, October 1990
The story tells us of two sets of invaders—the 16th-century Spaniard Pizarro, who violently invaded the Incan Empire, and the Krel, who economically and culturally invaded 21st-century Earth—and we briefly hear of one man’s use of Krel tech to travel from the 21st century to the 16th. —Michael Main
Sf is full of this sort of thing, from the power fantasy of the alienated child to the alternate history where Hitler is strangled in his cradle and the Library of Alexandria is saved from the torch.