Most common understanding about Indian Cast system is that, it has been derived from ancient Indian text or “Kavya” text (Ramayana & Mahabharata).Many foreign Indologist/ Orientals also propagating this idea with help of multi versatility of Sanskrit grammar. They accused Mahabharata Kavya has necessitate Cast system in its text by help of the Story of Dronacharya and Eklavya. But there is diverse voice inside Mahabharata itself which disqualify this idea that cast is based on Birth.
Mahabharata, Vana Parva ( Shlok 179: 1 & 179:2):-
The serpent said, ‘O Yudhishthira, say—Who is a Brahmana and what should be known? By thy speech I infer thee to be highly intelligent.
“Yudhishthira said, Those characteristics that are present in a Sudra, do not exist in a Brahmana; nor do those that are in a Brahmana exist in a Sudra. And a Sudra is not a Sudra by birth alone—nor a Brahmana is Brahmana by birth alone. He, it is said by the wise, in whom are seen those virtues is a Brahmana. And people term him a Sudra in whom those qualities do not exist, even though he be a Brahmana by birth. And again, as for thy assertion that the object to be known (as asserted by me) doth not exist, because nothing exists that is devoid of both (happiness and misery), such indeed is the opinion, O serpent, that nothing exists that is without (them) both. But as in cold, heat doth not exist, nor in heat, cold, so there cannot exist an object in which both (happiness and misery) cannot exist?”
Here, Reader should need to see Brahman/Kashtriya/Vaishya/Shudra division in Horizontal order as division of labor nor as division on basis of birth because its clearly objectionable like above mentioned verse.
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