The history of written constitutions
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Written constitutions emerged as a way of setting out the structure and limits of government in a single accessible document, rather than leaving those arrangements scattered across custom, precedent, and unwritten convention that could shift more easily over time without much public scrutiny at all being applied, which is not always immediately apparent.
Early written constitutions were often drafted at moments of significant political change, when founders sought to establish clear rules for a new or reorganised state, and to make those rules harder to alter than an ordinary law passed by a simple majority alone in parliament, a reminder that details matter enormously.
Since then, the written constitution has become one of the most widely adopted tools for organising modern government, valued for making the basic rules of political life visible and, in principle, equally binding on everyone within its reach regardless of status or position, which underscores why the safeguard matters.