At the start of the twenty-first century, a study was released which brought the thirteenth century starkly into the present. A 2003 study led by Chris Tyler-Smith published in the American Journal of Human Genetics simply titled “The Genetic Legacy of the Mongols,” determined that an alarming number of men across Asia, from China to Uzbekistan, carried the same haplotype on their Y-chromosome, indicating a shared paternal lineage. 8% of the studied group, just over 2100 men from 16 distinct populations in Asia shared this haplotype, which if representative of the total world population, would have come out to about 16 million men. This was far beyond what was to be expected of standard genetic variation over such a vast area. The researchers traced the haplogroup to Mongolia, and with the BATWING program determined that the most recent common ancestor lived approximately 1,000 years ago, plus or minus 300 years in either direction. The study determined that this could only be the result of selective inheritance, and there was only man who fit the profile, who had the opportunity to spread his genes across so much of Asia and have them be continually selected for centuries to come; that was Chinggis Khan, founder of the Mongol Empire. Identifying him with the Y-Chromosome haplogroup, the C3* Star Cluster, the image of Chinggis Khan as the ancestor of 0.5% of the world population has become irrevocably attached to his name, and a common addition in the comment sections on any Mongol related topic on the internet will be the fact that he is related to every 1 in 200 men in Asia today. Yet, recent studies have demonstrated that this may not be the case, and that Chinggis Khan’s genetic legacy is not so simple as commonly portrayed. I’m your host David, and this is Kings and Generals: Ages of Conquest.       Inside each human being are the genes we inherit from our parents. Distinct alleles within the thousands of genes of our 23 chromosomes affect the makeup of our bodies, from our physical  appearances to blood type. Each allele is inherited from our parents, who inherited from their parents, and so on, leaving in each human being a small marker of every member of their ancestry. Due to interbreeding and mixing over time, people living in a certain region will share  alleles, given that various members of their community shared ancestors at some point. A collection of these alleles is a haplotype, and a group of similar haplotypes with shared ancestry is a haplogroup. Tracing specific haplogroups attached to the Y-Chromosome, for instance, allows us to trace paternal ancestry of selected persons. It was the haplogroup dubbed the C3*star cluster that the researchers identified as Chinggis Khan’s haplotype, though later research has redefined it to the C2* star cluster. Thus, while you may see it somewhat interchangeably referred to as C3 or C2, depending on how recent the literature you’re reading is. Whoever carried the markers on their chromosome associated with this haplogroup, according to the study, was therefore a descendant of Chinggis Khan. The lineage, it should be noted, does not start with Chinggis Khan; it is detectable in the ancestors of the Mongols dating back at least to the fifth century BCE, to the Donghu people in eastern Mongolia and Manchuria. It is found in high frequencies in populations which had close contact with Mongols from Siberia to Central Asia, as as the Buryats, Udeges, Evens, Evenks, Kazakhs, and in lower frequencies in places conquered by the Mongol Empire. As demonstrated by the 2003 study, a map of these haplogroups lines up rather neatly with a map of the Mongol Empire at the time of Chinggis Khan’s death.        The 2003 study found that 8% of the men sampled had high frequencies of haplotypes from a set of closely related lineages, the C2*  star cluster. With the highest numbers of this cluster found in Mongolia, it was the logical origin point for this cluster. Its frequencies in so many p