Written vs. Unwritten Constitutions

Codified vs. Uncodified

The vast majority of the world's constitutions are codified — contained in a single written document that can be pointed to and read. The US Constitution fits in a pocket-sized pamphlet. India's runs to over 400 articles. Germany's Basic Law, France's Fifth Republic Constitution, and South Africa's 1996 Constitution are all single, authoritative texts.

A handful of countries — most notably the United Kingdom, Israel, and New Zealand — have uncodified constitutions. This does not mean they have no constitutional law. It means their constitutional rules are scattered across multiple sources: landmark statutes (like the UK's Parliament Acts 1911-1949, Human Rights Act 1998, and Constitutional Reform Act 2005), judicial decisions, conventions (unwritten rules followed by tradition), and authoritative texts. The constitutional order exists, but there is no single document you can hold up and say 'this is our constitution.'

The UK: A Constitution in Pieces

The UK's constitution is built from four sources. Statutes like Magna Carta (1215), the Bill of Rights (1689), the Parliament Acts, the Human Rights Act, and the Scotland Act create legal rules with constitutional significance. Common law — judge-made law built up through centuries of court decisions — establishes principles like the rule of law and the independence of the judiciary.

Conventions are unwritten rules that are followed because they are considered politically binding, even though courts cannot enforce them. The convention that the monarch must give royal assent to bills passed by Parliament, the convention that the Prime Minister must command a majority in the Commons, and the Sewel Convention on devolution are all constitutionally crucial but legally unenforceable.

Authoritative texts by scholars like Dicey, Bagehot, and Erskine May describe how the constitution works in practice. These have no legal force but are treated as guides to constitutional meaning.

Hybrid Approaches

Some countries combine elements of both models. Israel has a series of Basic Laws that were intended to eventually form a complete constitution but remain incomplete. The Israeli Supreme Court has treated some Basic Laws as supreme constitutional norms (famously in the 1995 Mizrahi Bank case), but the Knesset can amend most Basic Laws with a simple majority — blurring the line between constitutional and ordinary law.

Canada has a codified constitution (the Constitution Act, 1982, including the Charter of Rights and Freedoms) but also relies heavily on constitutional conventions inherited from the UK. The convention of responsible government — that the Prime Minister must maintain the confidence of the House of Commons — is nowhere in the written text but is fundamental to how the system operates.