[Dan Evans]

Factors like intelligence, manners, and initiative are cultural, not genetic. Western culture values these things, so they are encouraged.

Cultural factors encourage genetic effects -- and the process is recursive. Jewish mothers encourage their daughters to marry intelligent (and wealthy) men. As a result, Jews tend to be more intelligent.

[ffusco]

As opposed to non-Jewish mothers who encourage their daughters to marry ignorant louts?

You confuse success (wealth) with intelligence. A
A degreed professional may have more training and education than a plumber and is probably better informed, but that doesn't mean he is more intelligent.