Article 21 is a foundational provision in Part III of the Indian Constitution, guaranteeing the fundamental right to the protection of life and personal liberty. The text, adopted in 1950, states: "No person shall be deprived of his life or personal liberty except according to procedure established by law."
The provision was initially interpreted narrowly in A.K. Gopalan v. State of Madras (1950), where the Supreme Court held that "procedure established by law" meant any law enacted by the legislature, even if it was unfair. This narrow view was overturned in the landmark judgment of Maneka Gandhi v. Union of India (1978), which dramatically expanded the concept. The Court ruled that the procedure must be "fair, just, and reasonable," effectively reading a due-process requirement into Article 21 and transforming it from a mere procedural safeguard into a substantive guarantee against arbitrary state action.
The expansive interpretation of Article 21 by the judiciary is its core mechanism, connecting it to a host of other rights and concepts. The right to life is interpreted as the right to live with human dignity, not mere animal existence. This has led to the recognition of derivative rights, such as the right to livelihood (Olga Tellis v. Bombay Municipal Corporation, 1985), the right to a clean environment (Subhash Kumar v. State of Bihar, 1991), and the right to privacy (K.S. Puttaswamy v. Union of India, 2017).
The provision has been formally amended, with the 86th Constitutional Amendment Act, 2002, inserting Article 21A, which mandates the State to provide free and compulsory education to all children between the ages of six and fourteen years. Furthermore, the 44th Constitutional Amendment Act, 1978, ensured that the enforcement of Article 21 cannot be suspended even during a Proclamation of Emergency. Recently, the Supreme Court has continued to expand its scope, for instance, by recognizing Menstrual Health and Hygiene as a fundamental right under Article 21 in Dr. Jaya Thakur v. Government of India & Ors. (2026).