One must wonder how much that has to do with our individualist society that tries to assign rewards to individuals instead of emphasizing group cooperation and communal advancement. In a society that freely shares, would IQ be as powerful a predictor?

An intelligence test for groups of people would be a very interesting idea.

Wow, this is such an out-of-left field but excellent idea. I personally spent most of my formative years in a culture that wasn't as individualistic as american culture so the IQ test having such an implicit individualistic bias to it is fascinating to me.