The Indo-European rex was much more a religious than a polit[ical figure]… rex we must see not so much the ‘sovereign’ as the one who traces out the line, the way which must be followed, which also represents what is right.
Benveniste’s etymological analysis establishes that Indo-European kingship is fundamentally a sacred, boundary-tracing function rather than a political one, grounding the archetype in the root meaning of ‘right direction.’
, Indo European Language and Society, 1973thesis