So, if you go back far enough in the history of our species, you can find a common ancestor between any two people. We have 7 billion people in the world. Every person has two parents, and every one of them had two parents, every one of them had two parents. If you keep going back, that’s like trillions of people in the world. But in the past there weren’t trillions of people in the world. So how do you get trillions of parents but you only had a fraction of the population that we have today? The family tree of humanity is converging. If someone asks you, What are you?, typically implying what is your ethnicity, what we do is we say, Okay, I’m Mexican. Well, where were you born? Born in New York. Where were your parents born? Oh, they were
