The king or another might act as his own priest--yet were there priestly families.

The cow-boys might fight--yet were there those of the people that were especially 'kingsmen,' _r[=a]janyas_, and these were, already, practically a class, if not a caste[6].

These natural and necessary social divisions, which in early times were anything but rigid, soon formed inviolable groups, and then the caste system was complete.

In the perfected legal scheme what was usage becomes duty.

The warrior may not be a public priest; the priest may not serve as warrior or husbandman.