It's been a few years since I read 'Joker: Devil's Advocate', but I keep coming back to it. What's clever is how it frames a classic moral puzzle—sacrificing one to save many—as a cold, almost bureaucratic act. The Joker commits a mass poisoning, not for chaos, but to pose a very literal trolley problem to Batman and Gotham. He forces them to weigh a single innocent life against thousands. The book doesn't just have Batman grapple with it; it shows how the system, the media, and regular people react when that abstract philosophy becomes a terrifying reality.
I found the ending particularly unsettling. Without giving everything away, the resolution hinges on a point of law, a technicality about intent. It suggests that in a world bound by rules, true moral clarity might be impossible, and justice can become a paradoxical game. The Joker wins by making everyone play by his twisted rules, reducing a life-or-death dilemma to a legal loophole. That's the real horror of it—not the poison, but the corrosion of ethical certainty.
Honestly, it's one of the more thoughtful Joker stories. It uses him less as an agent of anarchy and more as a malevolent philosopher, exposing the cracks in our moral reasoning.