The Caste system of India is based purely on RACE. You only need look at the people from the north of India to see the racial traits that have Aryan roots and compare this to people from the south - who are of Dravidian descent. The Ario-Hindu god who rules over this Aryan class is Brahma - the god of Wisdom.
Two word plays have evolved in the English language which demonstrates this caste system. To be fair can mean to be just and even handed - to be honourable (Arya) as well as meaning having light skinned or having a pale complexion.
The word Weiss - which is German for white also has its root in the English word Wise - to be Wise or knowledgeable is another example of Wisdom being associated with Whiteness.
Out of the corruption of women proceeds the corruption of races; out of the corruption of races, the loss of memory; out of the loss of memory, the loss of understanding, and out of this all evil.