The lack of depth of even the most ambitious lay thinkers never ceases to amaze me. I expect compartmentalizational ignorance from members of the academy, but the laity has no such excuse to specialize. I hear IQ this and that from people the time, and as far as I can tell, endless curiosity, extreme suspicion of your intuitions, the continuous accumulation of knowledge, and the continuous reformation of your frames in response to that knowledge is what creates ‘depth’. And as far as I know, Durant was right: that depth is most likely from the study of one or more dimensions of history- for it is demonstrated history – not justified – that tells us the truth of man.