The impossibility of making sense of war
Vonnegut spent decades unable to write this book because war resists the kind of storytelling that gives events meaning. The novel's fragmented structure shows that directly. There is no arc, no lesson, no redemption. Just events.
Trauma and the collapse of time
Billy's time-travel shows how trauma works on memory. Survivors don't process catastrophic events in sequence. The past intrudes on the present without warning. Vonnegut makes that experience the novel's actual form.
Fatalism as both escape and failure
The Tralfamadorian philosophy tells Billy that nothing can be changed and everything simply is. This gives him peace, but it also makes him useless. The novel shows how fatalism can look like wisdom while actually being surrender.
The gap between official history and lived experience
The Allied firebombing of Dresden was not part of the heroic WWII story Americans told themselves. Vonnegut forces it into view. The novel argues that what gets left out of official accounts is often the most important part.
Death as ordinary and constant
"So it goes" appears over a hundred times. Deaths pile up without ceremony. Vonnegut refuses to rank deaths by importance or give them dramatic weight. The effect is both numbing and accusatory.