Quote Originally Posted by Skrappie
the school of thought comes from the fact that we naturally dislike and disturst some things that preform the same function often for no reason. If its a slight difference your mind adjusts to put it in a catagory of better or worse. A few people would argue since everyone displays bias that it is a biological function, and dislike for 'other' people without any logical grounding is cultural, but stems from a biological function.
hmmmm, its just seems overly reductive. It seems to be saying that individual psychological processes are reducible to biological processes.

If we were talking about prejudice between things like strawberry jam vs grape jam, I might agree with you. Maybe my particular body just happens to get more out of strawberry. But then it's not a prejudice anymore, it's actually biologically justified.
On a larger scale, discussing prejudices about things I don't use (?) such as people I don't think this would hold.
Plus, creation of in-groups and out-groups is a human universal. It might explain why we have tendencies to develop prejudices, but it never justifies any particular one. Rather it would just point out that we should always be skeptical of creating groups.

Have you heard at all of E.O. Wilson? or Sociobiology?