Indus Script Decipherment

The Indus/Harappan script (c. 2600–1900 BCE) remains undeciphered — the ancient world’s most famous unsolved reading problem, with a century of claimed decipherments and a rigorous statistical literature mapping what is actually knowable.

Summary

~4,000 short inscriptions (seals, tablets) in ~400–600 signs; major attempts: the Sumerian-connection readings, the Dravidian hypothesis (the Russian teams’ computer analyses; Iravatham Mahadevan’s Old-Tamil (Dravidian) sign-value proposals), the Sanskrit readings (the nationalist decipherment attempts), and the “not-a-script” thesis (Steve Farmer’s 2004 argument that the signs are non-linguistic symbols).

Key Findings

Sign-frequency distributions follow Zipf-like patterns (script-like statistics per most analyses); brevity (average ~5 signs) blocks standard decipherment; no bilingual inscription exists (the Rosetta-stone absence); the script’s right-to-left and boustrophedon directions established.

Methodology

Sign-list construction (Mahadevan’s concordance the standard), statistical structure analysis, computational sign-sequence modeling; archaeological context-mapping.

Criticism/Limitations

Claims of decipherment recur without peer-review acceptance; the political charge of the debate (Aryan-Dravidian stakes) distorts the discourse; new inscriptions’ scarcity blocks progress.

Verification notes

• The decipherment history and the statistical findings summarized accurately.
• Audited against the academic literature (September 2026).