“You see, thats how things have evolved, that those five races have developed. You might say, in the middle there is black, yellow and white, and as a side branch of the yellow comes brown – these are always the parts that become extinct.
The whites are actually the ones, that develop what is essentially human inside of them. (Rudolf Steiner)
Source: Rudolf Steiner, Lecture on March 3rd, 1923 in Dornach, via Humanistische Aktion.