Hinduism is the third largest religion in the world, with about 1 billion believers, behind only Christianity and Islam. Of Persian origin, used to name the Indus River, Hinduism refers to all peoples living in the Indian subcontinent. .
Hinduism is known as one of the oldest religions of mankind, originating in prehistory. The main hypothesis for the origin of this religion goes back to the pre-classical period, when the region was invaded by Aryans, who would have written the Hindu scriptures. In Hinduism therefore, there is not a founder, as in other religions, but a multitude of distinct entities and branches.