Lots of economic history in this one, with the underlying themes of persecution and tolerance, here is the audio and video.

We talk about the evolution of anti-Semitism, how the Black Death influenced Europe, the economics and politics of volcanic eruptions, how much prejudice will come back, amateur astronomy,  Jared Diamond, cousin marriage and the origins of the West, why England was a coherent nation-state so early, the origins of the Industrial Revolution, Schindler’s List, and more.  I split the time between the two, here is one excerpt:

JOHNSON: Mark and I have done a lot of work on building datasets of Jewish persecution and Jewish expulsions at the city level and the country level in Europe over a very long period of time. And a question that I, for one, don’t fully understand is, you don’t need to actually kill all the Jews or expel them in order to extract resources from them. In fact, in some way, this is off the equilibrium path. You’re no longer in some optimal equilibrium for both the ruler and for the Jewish community.

Oftentimes, these Jewish communities would be expelled from a city, they would be invited to come back, and they would come back — in 5, 10, 15 years, sometimes even shorter. But that’s a little bit easier to understand.

In the case I gave you in England in 1290s, I think I understand a little bit about why it might have happened that way. I think it was signaling credibility in some political compact between the king and the nobles, but I’m not sure. But that’s an example of top down.

Other times, clearly, people are . . . You have, say, guilds moving against these Jewish communities. An example of this would be in 1614, when the most well-known Jewish persecution was in Frankfurt am Main. It was called the Fettmilch Massacre. Fettmilch was a baker. He was in guild, and he was upset about the terms of the political deal between the city rulers — the city council — and what the guilds were getting. One of the things that the guilds wanted were the Jews to be expelled. This was competition in some sense.

There was this bit from me:

COWEN: If the Black Death raised wages, does that mean that immigration today lowers wages?

And:

COWEN: Large volcanic eruptions earlier in history. From an economic point of view, what’s the single most interesting thing we know about them?

JOHNSON: I think what’s very interesting about the volcanic eruptions is that we are discovering more and more that they may have played a large role in political change that occurred. Joe Manning at Yale, and I believe his graduate student (Bruce M.S. Campbell) have been doing work on . . . They looked at a series of volcanic eruptions that led to the end of the pharaonic empire. That ended around 30 or 60 BC, I forget. Right around that time.

That was an empire that lasted for 300 years, but they experienced all these crop failures. And then once you look at it, you see that in Indonesia, all these major volcanic eruptions were happening in perfect timing with these crop failures that were taking place. Actually, they can tell from looking at the Nile and how much it’s flooding and things.

COWEN: Politics becomes nastier when the volcano goes off?

And from Mark Koyama:

COWEN: Why was China, as a nation or territory, so large so early in world history?

KOYAMA: Yeah, that’s a great question. There are several potential explanations, one of which is geographic. Another one would be an argument from the writing system. But I think the geography story is quite important. Jared Diamond, building on people like Eric Jones, argued that China’s geography . . .

Essentially there are two core geographic regions in China around the Yellow and Yangtze river deltas, which produced a huge amount of grain or rice. If you control those core regions, you can raise large armies. You can have a large population and dominate the subsequent regions.

Whereas, the argument is for Europe that these core regions are, perhaps, arguably more separated by geographical boundaries. The limitation of that argument on its own is that geography is static, so it doesn’t really tell you anything about the timing.

The interesting thing about China, in my view, is not just that it was once unified, or unified early. But it’s persistently unified. It reunifies. Interestingly enough, the periods of de-unification get consistently smaller. So there are always periods where it’s fragmented, like the warlord period in the early 20th century, but over time may become smaller.

Europe doesn’t seem to have that centrifugal force, so a lot of Europe is unified by the Romans, but it’s not able to come back together along those lines later.

And the argument that I put forward in an article with Tuan-Hwee Sng and Chiu Yu Ko of National University of Singapore is that it’s not just the core geographical reason. That’s part of it. But actually, the periodic threat from a nomadic steppe is another key factor.

This is geographic because China has a very sharp slope from really productive agricultural land to land which is only fit for horses, for Eurasian steppe. China could be invaded very easily from the north by these steppe nomads, whereas Europe — it was much less vulnerable to this. And that helps to explain why the Chinese state is often a northern state.

So if I can add, if you think about China today, or even China in the past, the really productive land — a lot of it’s in the quite far south, in Shanghai, Yangtze delta. But the political center of China is near Beijing, or it’s in the north. And that’s due to this political economy threat from the steppe. And it’s these periodic steppe invasions which we argue are responsible for the centralization, an almost militarized character of the Chinese state through history.

And:

COWEN: Max Weber. Overrated or underrated?

KOYAMA: Underrated.

COWEN: Why?

KOYAMA: Because most people just know the Protestant theory, and they misreport it. Whereas, actually, his most interesting stuff is on Chinese religion and ancient Judaism. And the role of —

COWEN: The history of music, right?

There is much more at the link.  I am very happy to recommend their forthcoming book Persecution and Tolerance: The Long Road to Religious Freedom.