Of the four major races: Negroid, Australoid, Mongoloid, and Caucusoid, we tend to use the term ‘Caucasian’ to refer to Europeans, because that’s the only choice the government gives us on our surveys.
To be accurate it should be northern european (atlantic-germanic) eastern european (slavic), southern european(mediterranean), old european(balkans), anatolian european (greek, sardinian, boot of italy). Iranic, semitic, turkic. and so on.
This is more important in america because we have had a civil war over race and we are very close to having another.