… say he had 2. If each of these had 2 children, and so on, down the generations for roughly 2000 years, there would be something like 16 billion people alive today, with ancestry dna traceable back to Jesus.
This, of course, would be true of any couple living in those days. Luckily for our planet, it doesn’t happen that way. War, the Black Plague, the Spanish Flu, bad hygiene, more war – all these things have made sure that we’re now a measly 6 billion people.
Theoretically, though, we’re all related to Jesus Christ – and to any old couple who lived back in the day. And to each other, come to think of it.