4 ideas
In Lahbabi's novel, a scientist discovers an elixir that confers immortality. The case shows a technological breakthrough setting off class conflict through its anticipated allocation, not through its actual use.
Mortality is the one condition that wealth and rank cannot currently buy out of, so it works as a floor of equality beneath all social hierarchy. A technology that makes survival purchasable removes that floor and turns class difference into a difference in kind of being. The masters would stay while the servants die, which makes inequality permanent and total rather than temporary.
Ask of any breakthrough not "what can it do?" but "who will get it, given who holds power now?" The people excluded read the answer from existing institutions before the thing reaches them.
The novelist changes one law of reality, here making death optional, and holds everything else constant, including existing class structures. The social reactions that follow expose values and power relations that ordinary conditions keep hidden. The method turns fiction into a controlled thought experiment on ethics and society.