Race and species – terminological confusion in fantasy

Originally posted on Military Fantasy:
In fantasy and sci-fi, there is a lot of talk about “races”. In Lord of the Rings, there are humans, elves, dwarves, orcs. In Star Trek, there are humans, Klingons, Andorians, Vulcans. In Star Wars, there are humans, . In Warhammer, there are humans, orcs / orks, elves / Eldar…