Dear @tanzil2024 !
Hassan!
I hope you don't get offended by the fact that I can't tell the difference between Bengal and India! Most East Asians consider the Indian subcontinent as one civilization! I expect you to write an interesting article about Bengal!
Don no batt!
It is partially true as the Sindh civilization emerged first from Pakistan but later the Arya civilization dominated the major p[art of India from the very beginning and what you know is about Arya civilization regarding Indian civilization. But Bengali civilization is different than these as Bengal, especially Bangladesh part was detached due to heavily forested areas and inaccessible conditions. So, our ancestors were in a dark era but some saints and Buddhist preachers came to our region and made our ancestors Muslims from the very beginning. The Buddhists were frightened by the Arya Hindus and they left the land to further eastern countries like Myanmar, Thailand, and others.
Though I am not a student of history, my knowledge is very limited but Bengal civilization was not as developed as others due to communication gaps at that time. Thanks for your comment.