Final answer:
Robert Browning's characterization of the Duke in 'My Last Duchess' displays an attitude of criticism towards the Duke, underscoring his jealous, manipulative, and egotistical traits, which critique societal issues like the objectification of women and abuse of aristocratic power.
Step-by-step explanation:
The depiction of the Duke in Robert Browning's poetry, particularly in the dramatic monologue 'My Last Duchess', is intended to evoke an attitude of disdain or criticism towards his character. Through the Duke's characterization, Browning reveals a character who is obsessively jealous, manipulative, and egotistical.
The Duke's behavior and his manner of speaking about his late Duchess expose his mercenary nature and his concern with power and control, rather than with love or compassion. Browning's portrayal is critical, emphasizing the Duke's moral flaws and the societal issues of the time, such as the objectification of women and the abuse of power by the aristocracy.