"Caucasian, literally, refers to people native to the Caucasus, but it has become interchangeable with any number of ‘White’ populations, most of whom trace their ancestry to Europe. But the roots of such terminology are a bit disturbing; it was postulated that the natives of the Caucasus exhibited the idealized physical appearance so the Caucasus were believed to be the birthplace of mankind. The logic behind this idea — the assumption that Whites exhibit the best physical appearance — is implicitly racist. Additionally, we now know our species first appeared in Africa, so the biology isn’t any good either. The connotations of the term Caucasian along with the geographical absurdity of using that term to describe all Europeans or Whites are the two main reasons we should abandon the term."
http://blogs.discovermagazine.com/gnxp/2011/01/stop-using-the-word-caucasian-to-mean-white/ (via queergiftedblack)