The term "ultimatum" in literature is often deployed as a marker of a decisive, non-negotiable moment that carries significant weight, whether in matters of politics, personal relationships, or existential choices. For instance, John Buchan uses it to underscore the dramatic repercussions in geopolitical maneuvers after Karolides' death [1], while Thomas Carlyle imbues it with a sense of dread and historical inevitability in his narration of royal decrees [2]. In more personal or rhetorical settings, such as in the works of Dale Carnegie and Juliette Drouet, the word signals a final challenge or proposal that leaves little room for further discussion [3, 4]. William James even toys with the notion philosophically, suggesting that the world itself might represent an ultimatum, highlighting the idea of a conclusive scenario beyond negotiation [5, 6]. Meanwhile, historical and social contexts—from Thucydides’ recounting of the Lacedaemonian crisis [7] to Riis’s depiction of modern authority figures [8]—further demonstrate the term's versatility and enduring power in literature as an instrument to signal irrevocable turning points.