All About Bharatiya Sanatana Dharmam otherwise known as Hinduism : Ch-3.12.
CHAPTER- 3 : HINDU DHARMA-12.
12. Varnasrama Dharma
The principle of Varnasrama Dharma is one of the basic principles of Hinduism. The Varnasrama system is peculiar to Hindus. It is a characteristic feature of Hinduism. It is also prevalent throughout the world according to Guna-Karma (aptitude and conduct), though there is no such distinct denomination of this kind, elsewhere.
The duties of the castes are Varna Dharma. The four castes are Brahmana, Kshatriya, Vaisya and Sudra. The duties of the stages in life are Asrama Dharma. The four Asramas or orders of life are Brahmacharya, Grihastha, Vanaprastha and Sannyasa.
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