Overt xenophibia, used during the United Kingdom EU referendum. |
Xenophobia, one of the most irrational and destructive of human emotions, may have an evolutionary basis as a defence against infection, so argue scientists from Aarhus University, Upsala, Sweden in a published in American Political Science Review yesterday.
It is readily understandable how an aversion to excrement and putrefaction evolved, even evolving olfactory mechanisms which interpret the scents given off as repulsive. It is maybe not quite so easy to understand why some people at least overreact and are repelled by such signs of difference as physical deformity, birthmarks, skin colour and dress and yet these reactions are strong enough and commonplace enough to prevent successful integration of immigrant and refugee populations. The internal immune system, which attempts to cope with potential pathogens once they have gained access to our bodies, is supplemented by a behavioural immune system which helps prevent infection in the first place. The authors argue that this is an overreaction of a hypersensitive behavioural immune system.