 This is about cousin marriage. I'll try to be quick. So if it begins that the church is undermining cousin marriage around 600, and then European economic success only really takes off maybe 1,000 years later, depending on what you think about the economic history, is it plausible that the initial effects of undermining cousin marriage may have been quite detrimental, like weakening social stability, making societies more fragmented? Yes, absolutely. So the first thing that in order to get to individuals, you had to break down the social safety nets in the fabric of complex kinship societies, which were really fundamental to how people were able to survive. And inheritance patterns had to be changed. So I would expect things to get worse before they got better. I mean, it took a long time. It took centuries for the church to alter these practices. And you don't get the emergence of, say, the first charter towns, where people are entering the towns as individuals until the 10th century and then 11th century.