Hinduism is the predominant and indigenous religious tradition of South Asia. Hinduism is often referred to as Sanātana Dharma (a Sanskrit phrase meaning “the eternal law”) by its adherents.
Hinduism is formed of diverse traditions and has no single founder. Among its roots is the historical Vedic religion of Iron Age India, and as such Hinduism is often called the “oldest living religion” or the “oldest living major tradition”.
Demographically, Hinduism is the world’s third largest religion, after Christianity and Islam, with more than a billion adherents, of whom approximately 1 billion live in India. Other significant populations are found in Nepal (23 million), Bangladesh (14 million) and the Indonesian island of Bali (3.3 million).
Hinduism is a diverse system of thought with beliefs spanning monotheism , polytheism , panentheism , pantheism , monism , atheism , agnosticism , gnosticism among others; and its concept of God is complex and depends upon each particular tradition and philosophy. It is sometimes referred to as henotheistic (i.e., involving devotion to a single god while accepting the existence of others), but any such term is an overgeneralization.
Hinduism does not have a “unified system of belief encoded in declaration of faith or a creed”, but is rather an umbrella term comprising the plurality of religious phenomena originating and based on the Vedic traditions.
(Dated: 1st February 2011: http://en.wikipedia.org/wiki/Hinduism)