3 ideas
In the title story, a hostile power beams hypnotic radio signals across a nation so its population loses the will to resist and accepts a counterfeit 'peace' that is really surrender. An agent uncovers the transmission scheme and turns the technology back against its makers.
The collection treats a story as a way to carry real scientific principles to lay readers, who absorb them because they are embedded in suspense and adventure rather than presented as lessons. The speculative element is kept tethered to known physics, chemistry, or biology so that the reader learns something true while being entertained, and that tethering is what separates 'hard' science fiction from fantasy.
The book reframes 'peace' not as the absence of conflict but as a manufactured psychological state an aggressor can induce in a victim to end resistance cheaply. Seen this way, calls for calm and accommodation become suspect when the party issuing them benefits from the other side's passivity, and this made the frame a covert anti-occupation message under censorship.