Sharon, when I said "geographically based", I was referring to the 3-race system in use when I was in grade school (a long time ago, now). That is White=Caucasoid=Caucasus (as defined above, apparently because the Turks thought that Caucasian slave girls were the definition of perfection), Asian=Mongoloid=Mongolia and Black=Negroid=Niger River (that's what I was taught it meant!). American Indians/Native Americans were considered Mongoloids.