Why is "Death and immortality in Middle-earth" trending?

Wikipedia Overview

J. R. R. Tolkien repeatedly dealt with the theme of death and immortality in Middle-earth. He stated directly that the "real theme" of The Lord of the Rings was "Death and Immortality." In Middle-earth, Men are mortal, while Elves are immortal. One of his stories, The Tale of Aragorn and Arwen, explores the willing choice of death through the love of an immortal Elf for a mortal Man. He several times revisited the Old Norse theme of the mountain tomb, containing treasure along with the dead and visited by fighting. He brought multiple leading evil characters in The Lord of the Rings to a fiery end, including Gollum, the Nazgûl, the Dark Lord Sauron, and the evil Wizard Saruman, while in The Hobbit, the dragon Smaug is killed. Their destruction contrasts with the heroic deaths of two leaders of the free peoples, Théoden of Rohan and Boromir of Gondor, reflecting the early medieval ideal of Northern courage. Despite these pagan themes, the work contains hints of Christianity, such as of the resurrection of Christ, as when the Lord of the Nazgûl, thinking himself victorious, calls himself Death, only to be answered by the crowing of a cockerel. There are, too, hints that the Elvish land of Lothlórien represents an Earthly Paradise. Scholars have commented that Tolkien clearly moved during his career from being oriented towards pagan themes to a more Christian theology.