As is usual for Medved, a dullard incapable of any kind of thought beyond the superficial, he doesn't think his thesis through. Wouldn't this imply that Moslem immigrants to Europe, with their risk-taking willingness to move to new environments, are their true hope for the future? That the old blue-bloods of this country are less fit than, say, the Nisei? And if the descendants of African slaves are not successful go-getters because their arrival was coerced, what about the immigrants who were fleeing religious persecution, or all the Americans who are descended from indentured servants? Are there no successful entrepreneurs in Europe or Asia or Africa? Should we give extra bonus points to the descendants of nomadic tribes of warriors, like the Germans? It's a very peculiarly narrow view of a kind of simplistic genetic determinism that ignores the complexities and the varieties of ways people got here to promote a ridiculous premise.
It never ceases to amaze me when a wingnut uses scientific style talk to justify some particularly odious point of view. I guess it is only fair, since they do they same thing with religious style talk as well.