I have often wondered whether the eigenvector of political orientation being low-dimensional (e.g. left-right, conventional-independent) is somehow related to bicameralism (i.e. which side has executive function). It seems like the struggle between left and right we see in the world around us mirrors a struggle within ourselves. The fact that right and left modes of thought are reflected in political arenas, social dynamics and intellectual occupations across human cultures is too universal to be coincidence. There is something qualitatively familiar between left- and right-mindedness that transcends social programming and I suspect may be rooted in neurophysiology.