It would not qualify. The ultra-Orthodox Jews example you give is of a set of individuals each pursuing their own fitness, and the set does well because each individual in the set does well. Group selection specifically refers to practices which make the group better off at individual cost. For example, if you had more daughters than sons, your group could grow faster- but any person in the group who defects and has more sons than daughters will reap massive benefits from doing so.
The moral of the story is, some people are oversensitive to "group" in the same sentence as "reproductive fitness." Try to avoid it.
It would not qualify.
Well in that case, I was not talking about group selection. I was referring to a set of individuals each of whose reproductive fitness would be enhanced by the beliefs shared by him and the other members of the set of individuals.
I think that in normal discussions, it's reasonable to refer to a set of individuals with shared beliefs as a "group." And if those beliefs generally enhance the reproduction of the individuals in that group, it's reasonable to state that the reproductive fitness in the group has been enhanced....
Here's the new thread for posting quotes, with the usual rules: