I'd add John Mearsheimer and Jeffrey Sachs. Dave is a well-spoken intelligent and curious guy with a good bullshit detector. He may not be an expert himself, depending on how you wanna define that, but he has a knack for finding, and then reading extensively, the most accurate most consistent most reasonable experts.

It's kind of like how a mediocre physics or mathematics undergraduate is "smarter" than Archimedes or Da Vinci in that the undergraduate can solve problems these guys couldn't. The undergraduate student will get the right answer to problems, might be able to win in an intellectual competition, because they read other experts like Newton which were more knowledegeable or insightful in some areas and are using their techniques.

Dave is the guy who finds and reads the experts among the experts and that allows him to destroy the more mediocre experts.