Hinduism is the most ancient of the 12 great religions of the world and nobody really knows how Hinduism really began to began with. But there are many different theories. The holy book of Hinduism is called the Bhagavad Gita. The Bhagavad Gita is to the Hindus just like the Bible is to the Christians, the Koran is to the Muslims and just like the Book of Mormon is to Mormonism.
Hinduism is the only pagan religion that is recognized as one of the 12 great religions of the world. According to most theology scholars Hinduism was founded about 7,000 years ago in the year 5,000 B.C. The Hindus have two different trinities, unlike the Christians who have only one. The first hindu trinity are the three Hindu gods. Which are Brahman, Vishnu, and Shiva. They represent the cycle of rebirth and reincarnation. Brahman is the creator of the universe, Vishnu is the preserver of the universe, and Shiva is the destroyer and the recreator. The second Hindu trinity are the three goddesses and wives of the gods of the first trinity. All six of these gods and goddesses have other incarnations. The double trinity of Hinduism represents the Jewish Star of David. In other words, two triangles, one upside down and the triangle right side up and they intersect each other. The six pointed star of David was originally a Hindu symbol meaning double trinity and the Jews of Israel adopted it from the Hindus and turned it into the Star of David.
Reincarnation is also a big belief in Hinduism. India has a caste system, or social class system. The highest class are the Hindu priests, than the military soldiers, than the farmers, and the lowest class are the servants. There is actually even a lower rank called the untouchables. They are the social outcasts and do not even belong to the caste system. The untouchables are basically the lowest of the low in the Indian society.
Let me take sometime to disprove a modern myth about the Hindu faith. Most people think that Hinduism is polytheistic. In other words the worship of multiple gods. But that is so far from the truth. For starters, most people in India, as soon as they reach a certain age, they will choose and dedicate their whole life to worship only one single god or goddess. On top of that, all of the Hindu deities are supposed to be the same manifestation as the supreme god Brahman. The Hindus believe that the supreme being is limitless and takes on many different forms. That is why there are so many different names for the divine being in Hinduism.
There is a very popular god in Hinduism known as Krishna. Krishna is the ninth incarnation of Vishnu. The reason why Krishna is the most popular god worshipped in the Hindu faith is because he is basically the Hindu version of Jesus Christ. Krishna came down to earth as a human baby and got crucified and died for the sake of mankind just like Jesus did. Jesus is to the Christians as Krishna is to Hinduism.