The rule of law is a principle of governance under which everyone, including government officials and the state itself, is accountable to law. It requires more than the existence of legislation: rules must be publicly available, applied fairly, and administered through independent institutions. The United Nations definition also requires consistency with international human rights standards. The central distinction is between power exercised within legal constraints and power exercised arbitrarily, even when authorities invoke legal forms. (un.org)
Historical development
Arguments for the supremacy of law appear in ancient Greek political philosophy. Aristotle contrasted government through law with government dependent on a ruler’s personal judgment, while recognizing that general rules cannot resolve every particular case. These discussions concerned ancient political communities rather than the full institutional requirements associated with the modern concept. (plato.stanford.edu)
In nineteenth-century Britain, A. V. Dicey gave the expression an influential formulation in Introduction to the Study of the Law of the Constitution (1885). He emphasized protection against arbitrary punishment, the subjection of officials and citizens to ordinary law, and the role of ordinary courts in protecting rights. His preference for common-law institutions was historically specific; subsequent accounts have questioned his distrust of administrative discretion and his characterization of continental legal arrangements. (plato.stanford.edu)
Core requirements
Legality means that public authorities act within legally established powers. Legislation must be enacted through the applicable procedures, and officials must comply with the legal limits governing their decisions. A legal authorization is not, by itself, sufficient if it permits uncontrolled or arbitrary power. (venice.coe.int)
Legal certainty concerns whether people can discover the rules governing their conduct and reasonably foresee their consequences. It includes accessibility, clarity, consistency, and stability. Restrictions on retroactive laws are particularly important in criminal law, where individuals must be able to know which conduct attracts punishment. Certainty does not prohibit legal change, but it requires attention to predictability and legitimate expectations. (venice.coe.int)
Equality before the law requires legal protections and obligations to be administered without unjustified discrimination. Judicial independence requires adjudication free from improper influence, while impartiality concerns the decision-maker’s relationship to the parties and issues. Access to justice includes a practical opportunity to challenge decisions, obtain a fair hearing, and secure effective enforcement of judgments. These requirements concern how institutions actually operate, not merely what constitutional texts promise. (venice.coe.int)
Formal and substantive conceptions
In jurisprudence, formal accounts emphasize qualities that allow law to guide conduct. Lon Fuller identified eight requirements: general rules, publication, prospectivity, intelligibility, consistency, practicability, relative stability, and correspondence between announced rules and official action. These concern the structure and administration of law rather than every possible judgment about its content. (plato.stanford.edu)
The distinction between legal validity and moral merit is central to legal positivism. On this view, identifying a rule as law does not establish that it is just or that it should be obeyed. Equally, procedural regularity alone cannot establish the justice of a legal system: clear, prospective, consistently administered rules can still impose discriminatory arrangements. (plato.stanford.edu)
Substantive accounts incorporate requirements concerning rights and the permissible content of law. The UN definition explicitly includes international human rights norms, participation, transparency, and fairness. This helps distinguish the rule of law from rule by law, in which legal instruments organize governmental action without adequately constraining those who exercise power. The UN also distinguishes the economic usefulness of predictable legal arrangements from the broader requirements of inclusive, rights-respecting development. (un.org)
Institutions and democracy
The rule of law and democracy are related but not identical. Democracy concerns political participation and public authorization of government; the rule of law concerns legal constraints and accountability in exercising authority. Elections therefore do not, by themselves, establish that governmental decisions respect rights or follow fair procedures. Conversely, legal institutions help protect the political equality and freedoms necessary for meaningful participation. (un.org)
A constitution can establish institutional powers, rights, and mechanisms of accountability. Separation of powers distributes governmental functions, while judicial review permits courts to examine the legality of public action. In administrative law, the relevant question is not simply whether officials possess discretion, but whether its exercise is legally bounded and reviewable. Institutional arrangements differ across jurisdictions; the rule of law is not confined to one court structure or legal tradition. (un.org)
International application and assessment
At the international level, the principle concerns accountability under international law as well as domestic legal order. Its development dimension appears in the UN’s Sustainable Development Goal 16: target 16.3 calls for promoting the rule of law nationally and internationally and ensuring equal access to justice. UN justice activities also address the effectiveness, transparency, and accessibility of institutions, including in conflict-affected societies. (unstats.un.org)
Assessment requires examining practice alongside legal texts. The World Justice Project Rule of Law Index uses public and expert surveys across eight dimensions: constraints on government powers, absence of corruption, open government, fundamental rights, order and security, regulatory enforcement, civil justice, and criminal justice. Its scores reflect a specified framework and collected experiences and perceptions. The Venice Commission’s 2016 checklist instead organizes detailed legal and institutional questions; its accompanying explanation cautions that assessment requires an overall appraisal rather than simply counting satisfactory answers. (worldjusticeproject.org)