Though the physical characteristics of the two sets of tribes
display no marked points of difference, it has been generally held
by ethnologists who know them that they represent two distinct waves
of immigration, and the absence of connection between their languages
bears out this view. It has always been supposed that the Mundas were
in the country of Chota Nagpur and the Central Provinces first, and
that the Dravidians, the Gonds, Khonds and Oraons came afterwards. The
grounds for this view are the more advanced culture of the Dravidians;
the fact that where the two sets of tribes are in contact those of the
Munda group have been ousted from the more open and fertile country,
of which according to tradition they were formerly in possession;
and the practice of the Gonds and other Dravidian tribes of employing
the Baigas, Bhuiyas and other Munda tribes for their village priests,
which is an acknowledgment that the latter as the earlier residents
have a more familiar acquaintance with the local deities, and can
solicit their favour and protection with more prospect of success. Such
a belief is the more easily understood when it is remembered that
these deities are not infrequently either the human ancestors of the
earliest residents or the local animals and plants from which they
supposed themselves to be descended.