Possible it is. Well, maybe. Because they are weakened by inbeeeding and low variability, more suspecible to sicknesses and environmental changes.
Btw, modern humanity has low genetic diversity too (except some San people), because we had only about 10’000 members sometime after out-of-africa. Some San neighbour is more genetically different from the next than a south american from a chinese.
Possible it is. Well, maybe. Because they are weakened by inbeeeding and low variability, more suspecible to sicknesses and environmental changes.
Btw, modern humanity has low genetic diversity too (except some San people), because we had only about 10’000 members sometime after out-of-africa. Some San neighbour is more genetically different from the next than a south american from a chinese.