One of DS9's biggest missed opportunities was making the Klingons cool without ever seriously asking what life was like for the peoples living under the Klingon Empire.
By definition, an empire implies the conquest, domination, or political subordination of other peoples. Yet, apart from a few rare mentions, the Klingon Empire is almost exclusively presented as a closed club of warrior aristocrats: the Great Houses, their rivalries, their codes of honor, and their endless struggles for power.
We see the conquerors. We see the warriors. We see the politicians.
But where are the conquered?
We rarely see the peoples who were subjugated, exploited, assimilated, or forcibly incorporated into the Klingon Empire. What is life like for them? Do they have any political rights? Can they rise within the Empire? Are they allowed to preserve their own cultures and languages? Or are they simply expected to serve the Klingon ruling class?
This is particularly striking in DS9 because the series is exceptionally good at showing the complexity and cruelty of the Cardassian occupation of Bajor. We see the occupation from the perspective of the occupied. We see its economic, political, cultural, and psychological consequences. We understand what it means to actually live under an imperial power.
The writers could have applied the same critical lens to the Klingon Empire. Instead, they mostly chose to focus on its romanticized side: the "space samurai" aesthetic, the warrior culture, the concept of honor, and characters like Worf and Martok.
And I think this reveals an interesting asymmetry in the way DS9 approaches imperialism.
Cardassia is an empire because Cardassians are the villains. The Klingon Empire is often treated as "culture" because the Klingons have become cool, charismatic, and sometimes even heroic characters.
The result is a strange paradox: DS9 deconstructs Cardassian imperialism by asking what it means to live under Cardassian rule, while rarely asking the same question about the Klingon Empire.
What does it actually mean to be a non-Klingon living under Klingon rule?
Even the Romulans, in a feature film, offer at least a fleeting glimpse of this dynamic: in Star Trek: Nemesis, the Remans, Romulans’ own subjugated people, reveal the existence of an internal imperial hierarchy, where domination exists not only outwardly, but within the empire itself.
Perhaps the biggest missing element in the Klingon Empire isn't another warrior, another Great House, or another ritual of honor.
It's the subjects.
An empire without subjects is a very convenient empire to romanticize.