Icon66: Physical differences do, in fact, exist and certain characteristics are more common with different races.  It would be nice if someday we can ALL say "OK, so what?"  We're a long way from being there.  The social and economic ramifications of "race" are the real issues.  The fact that in our culture people are treated differently based on their race.  That's the "social construct" you reference and, yes, that's what needs to be discussed.   regards, Gary