Madison’s warning in Federalist No. 37, that no language could ever be precise enough to remove all doubt, has proved remarkably accurate. Vagueness, far from weakening the Constitution, has arguably been one of the main reasons it has lasted since 1789 without a full rewrite.

The case for the current constitutional framework

• The combination of codification, entrenchment and controlled vagueness has produced one of the most stable and enduring constitutions in the world, with only 27 amendments in well over two centuries.
• The framework of enumerated and implied powers has allowed the federal government to adapt to challenges the Founding Fathers could not have foreseen, from a national banking system to responses to public health emergencies. This has happened without needing constant formal amendment.
• Judicial review, though not written into the original text, gives the Constitution a mechanism for updating its meaning that does not depend on the difficult Article V process.

The case against the current constitutional framework

• The same vagueness that gives flexibility also produces uncertainty. Supreme Court justices frequently disagree, often along ideological lines, about what the same words require, as seen in the 2025 to 2026 rulings on birthright citizenship and tariff powers.
• The formal amendment process is now so difficult that popular reforms such as the Equal Rights Amendment and the Flag Desecration Amendment have failed despite significant public and congressional support.
• So much real change now happens through implied powers and judicial interpretation rather than the text itself. Critics associated with originalism (the view that judges should interpret the Constitution according to its original eighteenth-century meaning) disagree with this trend. They argue that it lets unelected judges, rather than voters or their elected representatives, decide what the Constitution means.

Reaching a judgement

Analysis	Evaluation
Vagueness, codification and entrenchment do not all pull in the same direction.Codification and entrenchment fix the Constitution’s core structure in place, while vagueness quietly lets its meaning evolve underneath that fixed structure, mainly through the Supreme Court rather than through Article V.	On balance, this combination has given the United States one of the most durable constitutional frameworks in the world.However, durability has come at the cost of formal responsiveness.When society has wanted rapid, clearly-mandated change, such as guaranteeing equal rights for women, the formal process set out in Article V has consistently proved too difficult to use.

Check your understanding 1. Summarise, in no more than five bullet points, the key features that give the US Constitution its distinctive nature. You could: draw one bullet point from each of the three main sections of this document: vagueness/codification/entrenchment, the framework of powers, and the amendment process. 2. Evaluate the claim that vagueness is more important than codification in explaining why the US Constitution has survived for so long. You should: define both terms briefly, present evidence for and against the claim from this document, and reach a clear judgement rather than presenting both sides with no conclusion. 3. ‘The US Constitution’s amendment process is its greatest weakness.’ To what extent do you agree, when compared with the flexibility of the UK constitution to adapt to changing circumstances? You should: weigh the advantages and disadvantages of Article V covered above against the ease with which the UK constitution can be changed by Parliament, then reach an explicit judgement rather than simply listing similarities and differences.