Hinduism is the oldest religion in the world, originating in Central Asia and the Indus Valley, still practiced in the present day. The term Hinduism is what is known as an exonym (a name given by others to a people, place, or concept) and derives from the Persian term Sindus designating those who lived across the Indus River. Adherents of the faith know it as Sanatan Dharma (“eternal order” or “eternal path”) and understand the precepts, as set down in the scriptures known as the Vedas, as having always existed just as Brahman, the Supreme Over Soul from whom all of creation emerges, has always been. Brahman is the First Cause which sets all else in motion but is also that which is in motion, that which guides the course of creation, and creation itself.
Accordingly, one may interpret Hinduism as monotheistic (as there is one god), polytheistic (as there are many avatars of the one god), henotheistic (as one may choose to elevate any one of these avatars to supremacy), pantheistic (as the avatars might be interpreted as representing aspects of the natural world), or even atheistic as one might choose to replace the concept of Brahman with one’s self in striving to be the best version of one’s self. This belief system was first set down in writing in the works known as the Vedas during the so-called Vedic Period c. 1500 - c. 500 BCE but the concepts were transmitted orally long before.