Religion:Early history of Hinduism:

Beliefs about the early development of Hinduism are currently in a state of flux:
The classical theory of the origins of Hinduism traces the religion's roots to the Indus valley civilization circa 4000 to 2200 BCE. The development of Hinduism was influenced by many invasions over thousands of years. The major influences occurred when light-skinned, nomadic "Aryan" Indo-European tribes invaded Northern India (circa 1500 BCE) from the steppes of Russia and Central Asia. They brought with them their religion of Vedism. These beliefs mingled with the more advanced, indigenous Indian native beliefs, often called the "Indus valley culture.". This theory was initially proposed by Christian academics some 200 years ago. Their conclusions were biased by their pre-existing belief in the Hebrew Scriptures (Old Testament). The Book of Genesis, which they interpreted literally, appears to place the creation of the earth at circa 4,000 BCE, and the Noahic flood at circa 2,500 BCE. These dates put severe constraints on the date of the "Aryan invasion," and the development of the four Veda and Upanishad Hindu religious texts. A second factor supporting this theory was their lack of appreciation of the sophisticated nature of Vedic culture; they had discounted it as primitive.
Emerging The Aryan Invasion view of ancient Indian history has been challenged in recent years by new conclusions based on more recent findings in archaeology, cultural analysis, astronomical references, and literary analysis. One scholar, David Frawley, has established a convincing argument for this new interpretation. 7 Archeological digs have revealed that the Indus Valley culture was not "destroyed by outside invasion, but...[by] internal causes and, most likely, floods." The "dark age" that was believed to have followed the Aryan invasion may never have happened. A series of cities in India have been studied by archeologists and shown to have a level of civilization between that of the Indus culture and later Indian culture, as visited by the Greeks. Finally, Indus Valley excavations have uncovered many remains of fire alters, animal bones, potsherds, shell jewelry and other evidences of Vedic rituals. "In other words there is no racial evidence of any such Indo-Aryan invasion of India but only of a continuity of the same group of people who traditionally considered themselves to be Aryans...The Indo-Aryan invasion as an academic concept in 18th and 19th century Europe reflected the cultural milieu of the period. Linguistic data were used to validate the concept that in turn was used to interpret archeological and anthropological data."

During the first few centuries CE, many sects were created, each dedicated to a specific deity. Typical among these were the Goddesses Shakti and Lakshmi, and the Gods Skanda and Surya.

Sacred texts:The most important of all Hindu texts is the Bhagavad Gita which is a poem describing a conversation between a warrior Arjuna and his charioteer Krishna. It is an ancient text that has become central to Hinduism and other belief systems. Vedism survives in the Rigveda, (a.k.a. Rig Veda) a collection of over a thousand hymns. Other texts include the Brahmanas, the Sutras, and the Aranyakas.