Genocracy

Power structure based entirely on biological purity, hereditary sorting, and genetic modification, enforcing an optimization-driven caste system or DNA apartheid.

The chilling inevitability of biological destiny, the visceral horror of DNA apartheid, and the desperate struggle against a system that predetermines worth by birthright. It's the dread of being judged, confined, or elevated solely by the purity or perceived superiority of one's bloodline.