Definitely harmful, the Catholic Church is actually what really caused the problems because the interaction between the two made diseases spread, and fights begin when Native Americans didn't want to change
The Indus River valley civilization was a theocracy run by a priest and karma played a very big role in their laws
The civilization was plolythiestic and was made up of Hinduism bhudism and Jainism
The economy was based on agriculture and trade with the people there making items like cloth and pottery
The social hierarchy went like this
Gods
Kshatryia
Vaishya
Sudra
And then the untouchables
Lighting kerosene lamps. Petroleum in the form of tar from oil seeps in the ground were used to seal boats and the roofs of houses.