@bbartlog 
 
"situation where the Scots-Irish are somehow less adapted to the modern American diet than other European lineages." 
 
Not that surprising given that Irish people have much higher rates of coeliac disease.

agnostic, another point on Greece's moden cultural achievements. 
 
Most of Greece's modern population are Hellenised Slavs, Turkey retained more of the Greek genepool.

Japan is probably the best place to look at for indicators of this kind, leading to a questionable conclusion that religion becomes more superstittion, shared rituals (even on the level of "knock on wood") and things like accepted norms of behaviour, with fortune telling, tarot etc. as it might work, and there's no harm in it. 
 
There's a big problem with this though in the homogenity of Japanese population, especially compared with the USA. 
 
Razib, permission to post this on 
alt.history.future 
a newsgroup where we try to extrapolate future trends etc. without fallingf into SF traps. Please?