"Beowulf: The Monsters and the Critics" was a 1936 lecture given by J. R. R. Tolkien on literary criticism on the Old English heroic epic poem Beowulf. It was first published as a paper in the Proceedings of the British Academy, and has since been reprinted in many collections.
Tolkien argues that the original poem has almost been lost under the weight of the scholarship on it; that Beowulf must be seen as a poem, not just as a historical document; and that the quality of its verse and its structure give it a powerful effect. He rebuts suggestions that the poem is an epic or exciting narrative, likening it instead to a strong masonry structure built of blocks that fit together. He points out that the poem's theme is a serious one, mortality, and that the poem is in two parts: the first on Beowulf as a young man, defeating Grendel and his mother; the second on Beowulf in old age, going to his death fighting the dragon.
The work has been praised by critics including the poet and Beowulf translator Seamus Heaney. Michael D. C. Drout called it the most important article ever written about the poem.[1] Scholars of Anglo-Saxon agree that the work was influential, transforming the study of Beowulf.