The were the first people who inhabited India.

This would have been between 7,000 and 3,000BCE. These Zagrosian herders mixed with the earlier inhabitants of the subcontinent - the First Indians, descendants of the Out of Africa (OoA) migrants who had reached India around 65,000 years ago - and together, they went on to create the Harappan civilisation.

i think it was because of how protected egyptian civilization was was which allowed them to evolve without much outside influence.