The core of the controversy was not only Sloterdijk's ideas but also his use of the German words "Züchtung" ("breeding", "cultivation") and "Selektion" ("selection"). Sloterdijk rejected the accusation of Nazism, which he considered alien to his historical context. Still, the paper started a controversy in which Sloterdijk was strongly criticized, both for his alleged usage of a fascist rhetoric to promote Plato's vision of a government with absolute control over the population, and for committing a non-normative, simplistic reduction of the bioethical issue itself. This second criticism was based on the vagueness of Sloterdijk's position on how exactly society would be affected by developments in genetic science. After the controversy multiplied positions both for and against him, "Die Zeit" published an open letter from Sloterdijk to Habermas in which he vehemently accused Habermas of "criticizing behind his back" and espousing a view of humanism that Sloterdijk had declared dead.