What are some major events in the history of Hinduism?

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Hinduism is a term for a wide variety of related religious traditions native to India.[1] Historically, it encompasses the development of Religion in India since the Iron Age traditions, which in turn hark back to prehistoric religions such as that of the Bronze Age Indus Valley Civilization followed by the Iron Age Vedic religion.

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There are many events and a long, rich and complex history in Hinduism. I suggest you research this topic by starting with the Wikipedia article on Hinduism and go from there.