All About Bharatiya Sanatana Dharmam otherwise known as Hinduism : Ch-3.15-1.
CHAPTER- 3 : HINDU DHARMA- 15-1.
15. The Law of Spiritual Economics-1.
The underlying principle in caste system or Varna Dharma, is division of labour. Rishis studied human nature carefully. They came to the conclusion that all men were not equally fit for all kinds of work. Hence, they found it necessary to allocate different kinds of duties to different classes of people, according to their aptitude, capacity or quality.
The Brahmanas were in charge of spiritual and intellectual affairs. The work of political administration and defence was given to the Kshatriyas. The Vaisyas were entrusted with the duty of supplying food for the nation and administering its economic welfare. The Sudras did Service side. The Rishis felt all these needs of the Hindu nation and started the system of Varnas and Asramas.
To be continued...