Tolkien's Magic Explained: Why Gandalf Doesn't Cast Spells

A close reading of Tolkien's theory of magic, taking on the popular Reddit question of why Gandalf doesn't cast spells. The answer is not that Tolkien forgot to write a magic system but that he spent thirty-six years building one — a moral grammar in which "magic" means apparatus, technique, and the coercion of other wills, and is explicitly equated with the Machine and the Enemy. Drawing on Letter 131, Letter 155, the Ainulindalë, On Fairy-Stories, and Smith of Wootton Major, the episode walks through sub-creation, the Istari restriction, the Bridge of Khazad-dûm read as identification rather than incantation, and the contrasting fates of Saruman, Sauron, and Galadriel. The payoff: modern fantasy magic systems are, in Tolkien's terms, the Enemy's mode rendered fun. Gandalf doesn't cast spells because casting spells is what the bad guys do.