the book is good, but starts at a false premise. Jews are not a single people. what you can say to the yemenite jew its not the same for the american jew. jews were and are a transforming mutating civilization, and mostly a religious civilization. anything that is out off the religious centre its NOT jewish. So whatever we contribute to western culture makes us westerners not jews!! so westerners are smart.
Israeli soldier collapses, dies from heatstroke during visit to Jerusalem's Old City (Haaretz)
from the article: What makes Jews so smart?