User blog comment:Master Sima Yi/Assassinews 02-06-'12 — Assassin's Creed III: Liberation revealed!/@comment-188.82.86.141-20120621104927/@comment-1153722-20120621112532

Desmond is far from the only one with First Civilization DNA; a lot of people have it, though not in the same concentrations as Desmond does. And, the following quote "His genes contain high concentrations of First Civilization DNA. Only about one in ten million are so lucky," is also something to consider when keeping in mind that there are 7 billion people in the world. So there must be about... 70 people with the same concentrations of First Civilization DNA in their genes. That, plus all the people who have lesser concentrations in their genes, makes for quite a few people.