One of the more common observations about Star Trek: Deep Space Nine is that it is the most “morally ambiguous” Star Trek series, with characters engaging in actions that Picard never would have considered on Star Trek: The Next Generation.
In some ways, this observation makes sense. After all, Deep Space Nine was the first Star Trek show to feature an extended interstellar conflict. Its primary cast is comprised of unapologetic terrorists and untrustworthy wheeler-dealers. The Federation were no longer the unambiguous good guys of the larger Star Trek universe, monolithic humanity giving way to factions like the Maquis or Section 31. Deep Space Nine never took Gene Roddenberry’s utopia for granted, daring to ask what it might look like when paradise found itself under threat.
However, Deep Space Nine also a very strong moral compass. While there are episodes that flirt with the idea of the end justifying the means, like In the Pale Moonlight or Inter Arma Enim Silent Leges, they are very much the exception rather than the rule. Section 31 are unequivocally monsters, and never proven to be a necessary evil. The Federation wins the Dominion War without the help of their attempted genocide in Extreme Measures. Even the Maquis are treated as ineffective in Defiant, and only romanticised through eulogy in Blaze of Glory.
More than that, Deep Space Nine clearly has a very strong social conscience. This is particularly true in episodes written by executive producer and showrunner Ira Steven Behr. Past Tense, Part I and Past Tense, Part II rage against the treatment of the homeless in contemporary society, sending three regular characters back in time to protest a nineties Los Angeles ordinance. Bar Association insists upon the right to collective bargaining. Far Beyond the Stars is a poignant ode to the power of science-fiction as a window to a better future.
Even in the context of the show’s more controversial elements, that moral compass shines through. While the Dominion War might lead to murky compromises, the show goes out of its way to cast the Founders as monstrous; the enslavement of the Jem’Hadar as explored in The Abandoned or of the Vorta as touched upon in Treachery, Faith and the Great River, the use of biological weapons in The Quickening, the disregard for soldiers’ lives in Rocks and Shoals. The Dominion is monstrous, as unequivocally evil as Nazi Germany.
As such, Waltz really serves to confirm something that has always been true of the series. Despite the familiar refrain that Deep Space Nine embraces “moral ambiguity”, the truth is that Deep Space Nine has always believed “that there is really such a thing as truly evil.”