Khan Noonien Singh (or simply, Khan), was the most prominent of the genetically-engineered Human augments of the Multiverse, considered even over three centuries later to have been "the best" of them. Reappearing with a cadre of Augment followers, Khan was to become a notorious enemy of Jeffrey Sinclair and James T. Kirk, as well as a warning of the danger in attempting to create "supermen" through technological means. Records of the period, including Khan's origins, are vague. He was the product of a secret selective-breeding and genetic engineering program, based on the eugenic philosophy that held improving the capabilities of a man improved the entire Human race. Augments produced by the program possessed physical strength and analytical capabilities superior to ordinary Humans, and were created from a variety of Duyi'zu Earth's ethnic groups. Khan's background was suspected to be Sikh, from the northern region of India.