The encyclopedia's editors intended to cover the rise of the Bengal Delta on the physical plane, and its evolution to date, and the changing features of the formation of the delta's "janapada" or human settlements on the human plane. The latter includes the rise and fall of kingdoms, invasions from within and beyond and their implications, dynastic rules and administration, as well as other aspects of Bangladesh's past and present. Entries on topics after 1947 are restricted to the geographical region of Bangladesh. However, for biographical entries, the linguistic identity prevails.