"It seems that we might be subconsciously encoding the food value of our friends and associates, just in case we become very hungry "
After that, I had to read it all. And I did. Interesting and disturbing. Leaves a couple of questions unasked and unanswered. The most obvious question is: Do the correlations imply cause or effect? In other words, are the differences in neural activity the result of beliefs arrived at after years of conditioning or education; or does the neural bias spring from genetic roots and produce a tendency to develop the beliefs we observe.
The author's argument in favour of genetic benefits for the conservative poor strongly implies genetic determinism. If that hypothesis is correct, then it is very bad news indeed. It implies that there is no realistic possibility of reaching rational agreement between the "dominance seekers" and the "cultural egalitarians".
That, in turn, lends support I'd rather not have found, to my own nightmare scenario that we're heading for The Final War between those of us who wish to embrace the new opportunities to achieve omortality and transform ourselves into one or more new species; and those who not only do not wish to join us (which is their right) but who also intend to prevent us following that path. And will fight to the death to stop us.
I fear we're in the early stages of that War as we speak...