 "Ring of Swords", written by Eleanor Arnason in 1993, also depicts a war between two highly aggressive species, of which humans are one.The story deliberately inverts several aspects of "Starship Troopers"; the story is told from the point of view of diplomats seeking to prevent war, rather than soldiers fighting it; and the conflict is the result of the two species being extremely similar, rather than different.The film rights to the novel were licensed in the 1990s, several years after Heinlein's death.