Salus populi suprema lex

Salus populi suprema lex expresses the idea that the welfare and safety of the people is the highest object of law, so that private interests may have to give way where the public good requires it. It is a principle of public law and political philosophy rather than a rule with a fixed statutory home. In Indian law it is invoked to explain the basis of the State's regulatory or police power and of the power of eminent domain, often together with the companion maxim necessitas publica major est quam privata, public necessity is greater than private necessity.

The Constitution gives the idea concrete and limited form. Article 38 directs the State to strive to promote the welfare of the people by securing a social order informed by justice, social, economic and political, and other Directive Principles such as Article 47 on public health point the same way. The fundamental freedoms in Article 19(1) are subject to reasonable restrictions in the interests of the general public, public order, health and similar grounds under Article 19(2) to (6). Property may be acquired for a public purpose, and under Article 300A no person shall be deprived of his property save by authority of law.

The maxim does not give the State unlimited power. Indian courts treat the public interest as a ground that must be established through valid law and tested for reasonableness and proportionality. A restriction justified by public welfare must still satisfy Articles 14, 19 and 21, and the procedure must be fair. The maxim therefore supports, but does not replace, constitutional review.

It is often contrasted with maxims that protect the individual, and examiners usually ask its meaning in match the following questions. A good answer links it to police power, eminent domain and reasonable restrictions on fundamental rights.