> “I divide my officers into four classes; the clever, the lazy, the industrious, and the stupid. Each officer possesses at least two of these qualities. Those who are clever and industrious are fitted for the highest staff appointments. Use can be made of those who are stupid and lazy. The man who is clever and lazy however is for the very highest command; he has the temperament and nerves to deal with all situations. But whoever is stupid and industrious is a menace and must be removed immediately!”

I find the above amusingly accurate in a lot of cases backed up by anecdotal evidence. Aside form contradicting the thesis in the submission it has the huge advantage of not requiring to pay for and to read a whole book and I think it will provide just as useful for practical application, meaning not very.

As for the Big Five personality traits - I guess it's better than nothing but I find it funny how close its application is to teenager magazine tests from years ago "the 10 traits of the perfect boyfriend".