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Indian Polity & ConstitutionPrelims: HighMains: HighInterview: Medium12 min readUpdated 2026-05-25

Article 21 jurisprudence

Article 21 jurisprudence · right to privacy (Puttaswamy) · right to life · death penalty

Story hook

On 24 August 2017, in courtroom number 1 of the Supreme Court, nine judges sat in a line. The Chief Justice, J. S. Khehar, read out the order. The judgment ran to 547 pages, with six separate concurring opinions. The unanimous holding: "The right to privacy is protected as an intrinsic part of the right to life and personal liberty under Article 21, and as a part of the freedoms guaranteed by Part III of the Constitution."

The petitioner was a 91-year-old retired judge of the Karnataka High Court, K. S. Puttaswamy, who had quietly filed a writ challenging the Aadhaar scheme back in 2012. Five years later, his name was attached to what The Hindu called "the most significant constitutional judgment since Kesavananda Bharati." Privacy was now a fundamental right, expressly overruling two earlier Constitution Bench rulings — M. P. Sharma (1954) and Kharak Singh (1962) — that had said the opposite.

But to understand Puttaswamy, you have to walk back through six decades of Article 21 jurisprudence. From A. K. Gopalan (1950) which read Article 21 narrowly — "procedure established by law" meant any law, even harsh — to Maneka Gandhi (1978) which read it expansively — procedure must be "just, fair, and reasonable." From Olga Tellis (1985) which made shelter a right, to Vishaka (1997) which made workplace dignity a right. Article 21 is the vehicle of every new fundamental right India has discovered — to food, water, education, health, environment, sleep, internet access, and now privacy.

Why this matters for UPSC

Article 21 jurisprudence is the single most tested constitutional topic in UPSC over the last 15 years — Prelims (factual pairs), Mains (probably one essay-length question per year on a related rights expansion), and Interview ("what is the scope of right to life?"). Puttaswamy alone has been the subject of ~25 academic essays in the last 5 years of Mains. Mastering the expansion arc of Article 21 — from Gopalan to Puttaswamy and beyond — gives you the analytical scaffolding for almost any fundamental rights question.

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