Sovereign — India is not subject to any external authority. No foreign power can dictate governance. India can acquire or cede territory. Tested in Berubari Union Case (1960).
Socialist — Added by 42nd Amendment, 1976. Mixed economy, not pure communism. State must minimise inequalities of income and status. In Excel Wear v. Union of India (1978), SC clarified 'socialist' does not mean State can nationalise everything.
Secular — Added by 42nd Amendment, 1976. India follows POSITIVE secularism — State has no religion of its own but treats all religions equally (Sarva Dharma Sambhava). Distinctly different from Western negative secularism which rigidly excludes religion from public life.
Democratic — Sovereignty rests with the people, exercised through elected representatives. Includes adult suffrage (Article 326), free and fair elections, parliamentary form of government.
Republic — Head of State (President) is elected, not hereditary. President is indirectly elected through electoral college.
Justice — Three dimensions: Social (no discrimination), Economic (equitable distribution), Political (equal political rights). Inspired by Russian Revolution ideals.
Liberty — Liberty of thought, expression, belief, faith, worship — linked to Article 19. Not absolute; subject to reasonable restrictions.
Equality — Equality of status and opportunity — linked to Articles 14, 15, 16. Includes formal equality (before law) and substantive equality (actual equal treatment). Permits reasonable classification and protective discrimination.
Fraternity — Brotherhood among citizens assuring dignity of the individual and unity and integrity of the Nation. The ONLY value in the Preamble without a corresponding justiciable Fundamental Right — it is a moral and social value permeating the whole Constitution.