A succinct description of the themes of global power dynamics come from the official Russian Foreign Policy Document. The current one, issued in 2017 is a long read but presents a good overview of how the world is going to be.
Mamata's Islamisation of Bengali: She changed in school textbooks, 'Ramdhonu' word for rainbow to 'Rongdhonu' a new word used in Bangladesh and not part of Bengali. Similarly the word 'Akaashi' for sky blue colour changed to 'Aasmani' as used in Bangladesh. Mamata aiming at creating Greater Bangladesh?