It was this superiority of the civilization that the British wanted to destroy and it did succeed to a great extent.

Sanskrit which was the knowledge base of the Indo-Gangetic Plain alluvial plain society is no longer taught in Schools...

today the only thing to survive from the ancient Indian Civilization is the branch of Medicine called Ayurveda. Usually a master Ayurved also used to be a top warrior in Kalari who could paralyse people just by slight touches to their body nerves and only he can revive them back from paralysis. There still exists a few such people.