no.. caste system is not thre in the vedas.Is it not in the Vedas? (Curious, my knowledge about Hinduism isn't perfect, know more than most Pakistanis but still)
there is the term brahman which confuses people.
the term brahman was intorduced in the vedas.. brahman is an all supreme and all knowledgeble being which resides in all.
"Brahman is described in the following manner: "satyam jnanam anantam brahma", "Brahman is of the nature of truth, knowledge and infinity." Infinite positive qualities and states have their existence secured solely by virtue of Brahman's very reality. Brahman is a necessary reality, eternal (i.e., beyond the purview of temporality), fully independent, non-contingent, and the source and ground of all things. Brahman is both immanently present in the realm of materiality, interpenetrating the whole of reality as the sustaining essence that gives it structure, meaning and existential being, yet Brahman is simultaneously the transcendent origin of all things (thus, panentheistic).
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Brahmans never ever refrred to humans. but a more abstract thing like soul etc.
Later humans started calling those at the top of the hierarchy as Brahmins... the people who are knowledgable. this is different from the concpt of Brhman (derived form brahma) in vedas.
this is how caste and hinduism got associated.
i agree the practitioners of caste system are those who follow hindu religion, but i can assure you the religion especially in the pure form does NOT talk about social order . only about abstract philosophy.