- Article 21 is a fundamental right and one of the most important articles in the Constitution. - It protects the right to live with human dignity and includes within its ambit various rights like the right to live in a clean environment, right to privacy, right to health, right to education (under Article 21A), etc., as interpreted by the Supreme Court. - The phrase "procedure established by law" is distinct from "due process of law" (used in the US Constitution), although judicial interpretations, particularly after the Maneka Gandhi case, have brought aspects of due process under the purview of Article 21.