Perhaps you might be refering to the Mississippi Revival by Ray Stevens?
Its not important to some people, but important because some civilizations were built on their religion.
Chritianity predominantly
Hindu's religion has come from Indus civilization.
to maintain "civilization" yes would be the answer. --civilization: a place with order.
Harappan civilization is more ancient than the Aryan civilization. Definitely they would have practiced a different religion than the vedic Hindu religion. It is similar to the Sumerian civilization. One cannot find out the religion practised by them as no texts are available. Any speculation can only be a guess.
religion in ancient civilization could be accurate but if there was a way to find out more people would have tried a long time ago.
The Indian civilization founded Jainism. Jainism is a breakaway religion from Hinduism.
The Etruscan civilization was known for the character of their art and the distinct tenants of their religion. The civilization was based on the Italian peninsula.
The mound builders
Hinduism. Hinduism.
It was Rome
ancient Persians