How did the particular geographic location of India affect the life of its population?

It is known that ancient India was (and is now) on the territory of the Indian subcontinent. In those ancient times, this territory was a fertile land with a humid climate and abundant jungle. The main river systems of this region were the Indus and Ganges rivers. The Indus River became the main habitat of the ancient Harappan civilization. Only with the development of technology, the ancient Indians were able to clear their way to the Ganges River and organize a farm there.