From Terraciano et al. I inferred that the similarities are mostly within professions, not so much within nationalities: a prostitute from Dallas is going to be far more similar (in her behavior) to a prostitute from Cannes than to an accountant from Dallas; a philosopher from New York will be more similar to a philosopher from Bombay than to a New York trader, etc.
I was clearly the victim of the nationality fallacy in the New Yorker profile (Gladwell) that attributed my ideas (and trading style) to my Lebanese background & the war – given that it was so salient. I then searched & found 30 Christian Lebanese traders of my generation – all (I mean all) of them sell tail options (i.e. bet against the Black Swan). On the other hand my associate Mark Spitznagel is from the MidWest.
Nassim Nicholas Taleb