Which people of the indus river valley left a significant amount of literature yet no architectural artifacts, making it difficult to determine their origins?

The people of the Indus River Valley who left a significant amount of literature yet no architectural artifacts, were the Aryan people. That made it difficult to determine their origins were.

"Aryan" was a term used as self-designation by Indo-Iranian people. The term was used by the Indic people of the Vedic period in India as an ethnic label for themselves and to refer to the noble class.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

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