Having churned the duties enjoined in the four Vedas, the seers have delineated the six Shastras.
What ever was described by Brahma and Sanak, people recited and followed.
Many think over while reading and singing, but only one among millions understands and reads between the lines.
It is suprising that every age had dominance of one colour (caste) but how in Kaliyug myriads of castes are there.
That the duties of all the three Yugas have been abandoned is known
to everybody but the confusion persists.
As the four Vedas have been defined, the description of the six philosophies (Shastras) also complements them.
They all eulogise their own view point.