Hindus who form the bulk of population of India represent a unique system of their own. The elements of their faiths are not found in the same manner anywhere else in the world. Fundamentals of Hinduism are the system of castes, which form the basis of law and the conventions regulating community life. It governs the institution of Asrama-education and the means of livelihood. It filters down to the smallest details of daily life such as the naming of children and modes of salutation. Polygamy, the matriarchy, sonship, widowhood, joint family and marriage customs are reflected in Hindu social laws. Ritual-worship; the sacraments; sacrifices; ending with death; suicide; devadasi; suttee; the obsequies and sraddha rites and eschatology are peculiar features of Hindu religion.