1.) Fairly high confidence: The RCC/christendom was unique in that it banned cousin marriage between 4 and 7 degrees of consanguinity (depending on the time period), and had the record tracking infrastructure to implement such a ban.
2.) Also reasonably confident that 1.) had long term genetic/cultural consequences after a millennia. Eg: medieval europoean societies were more outbred than most middle eastern societies (where 1st degree cousin marriage was/is the norm).
3.) Less confident that those changes gave a significant edge, but it seems plausible.[1][2][3][4].
Akbari, Mahsa, Duman Bahrami-Rad, and Erik O. Kimbrough. “Kinship, fractionalization and corruption.” Journal of Economic Behavior & Organization 166 (2019): 493-528.
I appreciate the clarification, at first #1 seemed dissonant to me (and #2 and #3 following from that) given the trope of highly inbred European nobility, but on further reflection that might be mostly a special case due to dispensations. I hadn’t thought of worldwide consanguination/marriage norms as a potential X factor for civilizational development, but it’s an interesting angle.
Yeah the European nobility couldn’t follow the stringent outbreeding constraints (and naturally could pay for exemptions) because the dating pool was too small, but the attempts to do so still intermingled the european bloodlines. It’s historically wierd/unusual too - if you consider that the more common alternative would be intra-clan marriage within national/cultural borders.
In most other times/places cultures/nations/tribes engaged in total warfare and then destroyed/enslaved/conquered each other, vs constrained warfare combined with intermarriage alliance mingling. Marriage between people who spoke completely different languages was common for the european nobility, vs uncommon throughout most of history. But the europeans were semi-unified under a shared roman catholic cultural heritage.
To clarify:
1.) Fairly high confidence: The RCC/christendom was unique in that it banned cousin marriage between 4 and 7 degrees of consanguinity (depending on the time period), and had the record tracking infrastructure to implement such a ban.
2.) Also reasonably confident that 1.) had long term genetic/cultural consequences after a millennia. Eg: medieval europoean societies were more outbred than most middle eastern societies (where 1st degree cousin marriage was/is the norm).
3.) Less confident that those changes gave a significant edge, but it seems plausible.[1][2][3][4].
(https://news.harvard.edu/gazette/story/2019/11/roman-catholic-church-ban-in-the-middle-ages-loosened-family-ties/)
Schulz, Jonathan F., et al. “The Church, intensive kinship, and global psychological variation.” Science 366.6466 (2019).
Schulz, Jonathan F. The Churches’ bans on consanguineous marriages, kin-networks and democracy. No. 2016-16. CeDEx Discussion Paper Series, 2016.
Akbari, Mahsa, Duman Bahrami-Rad, and Erik O. Kimbrough. “Kinship, fractionalization and corruption.” Journal of Economic Behavior & Organization 166 (2019): 493-528.
I appreciate the clarification, at first #1 seemed dissonant to me (and #2 and #3 following from that) given the trope of highly inbred European nobility, but on further reflection that might be mostly a special case due to dispensations. I hadn’t thought of worldwide consanguination/marriage norms as a potential X factor for civilizational development, but it’s an interesting angle.
Yeah the European nobility couldn’t follow the stringent outbreeding constraints (and naturally could pay for exemptions) because the dating pool was too small, but the attempts to do so still intermingled the european bloodlines. It’s historically wierd/unusual too - if you consider that the more common alternative would be intra-clan marriage within national/cultural borders.
In most other times/places cultures/nations/tribes engaged in total warfare and then destroyed/enslaved/conquered each other, vs constrained warfare combined with intermarriage alliance mingling. Marriage between people who spoke completely different languages was common for the european nobility, vs uncommon throughout most of history. But the europeans were semi-unified under a shared roman catholic cultural heritage.