David Reich

And they're replaced by migrants from the continent bearing majority ancestry from the steppe north of the Black and Caspian Seas.

This is one place where we know what happened very well, but we see it all over Europe.

We see it in Spain.

We see it in Portugal.

We see it in the Netherlands.

We see it in Germany.

We see it in Czechia.

We see it in Italy.

We see it in Switzerland.

We see it everywhere.

This wave of people from the East arrives and it displaces these successful immigrants

impressive, densely packed farmers with new people who have this ancestry from the East who are not as focused on farming, although some of them are, as the people who came before.

That one's more- Because it causes inflation.

So it ends, I mean, in the medieval one creates a lot of inflation and the serfs, as I understand it, were sort of on fixed wages.

And so they had to be paid more.

It basically inflated out their sort of seniorial responsibilities.

That's documented with kinetics.

It's estimated to be not the primary pathogen.

Okay.

But who knows?