Alas, poor Tolkien the movie. The adjective “tepid” most accurately describes the critical response to this biopic, reverently directed by Dome Karukoski, which explores the early years of the author of The Hobbit (1937), the Lord of the Rings trilogy (1954–1955), and countless other works of medievalist fantasy. The idea behind Tolkien is that nearly every key theme in these novels had its origins in some episode of the young John Ronald Reuel Tolkien’s life, first at the prestigious King Edward’s boys’ school in Birmingham (where, as the gifted son of a cultivated but impoverished widow, he had a scholarship), then at Oxford University (another scholarship), and above all, in the trenches of the Somme, where he was posted as a second lieutenant in 1916 and had ample opportunity to experience all the horrors of World War I before succumbing to trench fever carried by the lice that infested the cramped and filthy bunkers. Thus, Tolkien, presented as a series of flashbacks playing inside the brain of the fever-stricken junior officer, trades heavily in one-on-one …