Races are a subtype of the same species denoted by varying physical traits and characteristics.
In WoW the orcs, humans, forsaken and elves are all different species - they ARE NOT races...so why do players and Blizzard continue to refer to them as "races"?
There may very well be races within the species of WoW - you could say that blood elves and night elves are both races of the elf species, but people and Blizzard need to correct themselves and stop using "race" to refer to what actually are different species.