Only history can trace the growth of this region and
be helpful to understand the evolution of its society
which throughout its existence remained multi-racial,
multi - faith and multi - cultural ; yet they pursued
almost same modes of production, evolved same
technique to harness nature and set up habitats at
the terminus of two mighty river basins of eastern
India. Societies were somewhat dissimilar, often
separated by endless numbers of rivers, and
interests within a society were conflicting. But, on
the whole, they showed common features in their
economic activities and aspirations for life.


During different phases of history, with changes in
those divisive and uniting elements, political
changes followed - contributing towards rise and
demise of so many rulers, dynasties and redrawing
of political boundaries.