Nope, it's easy to say that there are more successful Jews because they are smarter but the reason is cultural. IQ does have some value in getting ahead in life

Nope, it's easy to say that there are more successful Jews because they are smarter but the reason is cultural. IQ does have some value in getting ahead in life, for instance, you cannot have a 50 IQ and expect to be a leader in anything but after a certain point IQ, maybe average IQ, if you fight enough for what you want you will get it. And if you fight for a position of power you will get it. In Jewish families, sons and daughters are expected to do their best in society. Additionally, they are pushed to do their best in society. That's not always the case in every family. Also, culturally Jews are expected to fight their way through any obstacle. I suspect part of that is the fact that they've been discriminated for so long that they expect to fight for everything they get. I've seen it over and over where people of Jewish families will not give up until they get their way. While not everybody in that cultural sector has that type of determination a huge percentage does, therefore, if you fight hard enough you're bound to get what you want. High average IQ is important but not the primary reason for success.