re: Why Scientists and extremely smart people are usually socialist/leftist

Well Crystallized Intelligence (i.e.,acquired knowledge) is one of the highest loading factors on G (i.e., overall IQ), along with Fluid Intelligence (i.e., problem-solving and reasoning) and Quantitative Reasoning. So he's not incorrect that a major component of intelligence is one's general knowledge. That being said, intelligence is what tests are attempting to measure, not the other way around as his wording seems to suggest.