What is the primary theme of Shakespeare's play "Hamlet"?

The primary theme of Shakespeare's play "Hamlet" is revenge. The narrative centers around Prince Hamlet, who is driven to seek vengeance for his father’s murder after the ghost of his father reveals that he was killed by Hamlet's uncle, Claudius. This quest for revenge forms the core of the plot, influencing Hamlet’s actions and interactions with other characters throughout the play.

Revenge leads to a cycle of violence, resulting in moral ambiguity and tragedy, as Hamlet grapples with his own indecision and the implications of acting on his desire for retribution. The theme not only propels the story forward but also raises questions about justice, morality, and the consequences of seeking vengeance. It showcases how the pursuit of revenge can consume an individual, leading to personal and collateral damage, underpinning the tragic elements of the play.