Combined multifarious deities into one spirituality.  Friendly relations with house snakes.  Ganid’s abstract of.  Influenced by Jainism, Islam, Christianity.  Integral part of social fabric of India.  Most adaptive, amorphic religion ever to appear.  Most ancient religion; most advanced for its time.  Nanak incorporated Hinduism into Sikhism.  Preaches devotion.  Religion of metaphysics. 
See also: UB 94:4.