In the heart of Eastern Siberia, where temperatures plummet below -60°C, the Yakut (Sakha) people developed a unique social architecture. Moving beyond clichés, polygyny here emerges as a true ‘engineering of dispersion’: a pragmatic and vital response to managing vast herds of horses in a hostile territory. Delve into the roots of this horse-riding civilization that transformed family organization into a tool for climatic resilience.