I thought Cochran and Harpending's letter was the most interesting. As for Murray, I think he tends to mythologize more than give primacy to empiricism. I find a Murray vs. Patricia Williams type dialectic to be annoying, performative, and mostly about manufacturing American cultural norms (while drowning out more interesting and critical voices). So I'm glad the discussion on the topics related to human intelligence is expanding, and expanding beyond some narrow Left/Right performance.