Here's why:
* The Narrator's Grief: The poem is narrated by a man who is clearly deeply mourning the loss of his beloved, Lenore. He is consumed by his grief and desperately seeks solace.
* The Raven's Symbolism: The raven, a bird often associated with death and misfortune, serves as a constant reminder of the narrator's loss. Its single word, "Nevermore," echoes the narrator's despair and reinforces his inability to find peace.
* The Theme of Hope Lost: Throughout the poem, the narrator desperately seeks answers and hope from the raven, only to be met with the relentless "Nevermore." This emphasizes the theme of hopelessness and the inability to move on from the past.
* The Haunting Atmosphere: The poem's atmosphere is dark, somber, and filled with a sense of dread. This reinforces the feelings of loss and despair that permeate the narrative.
While "The Raven" doesn't explicitly focus on death, the poem's exploration of grief, the presence of the raven, and the overwhelming sense of loss all contribute to the interpretation that it is primarily about the profound impact of loss on the human psyche.