at one time it was not of stretagic Interest that India / pakistan / afganistan should be one economic zone.
Now with strong China emerging, both Russia as well as USA wants India/pakistan/Afganistan to be one economic Zone and also want India MUSLIMS to make Pakistan as well as Afganistan Hardliners to be more flexible and tolerant.
India's muslims are much more free as compared to Masses in Pakistan & Afganistan.
If we (3) can live as a local ONE economic Zone with Bangladesh & Srilanka Joining in than global balance of Power is more BALANCED!!