Unitary state

• 1. Introduction

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  The unitary state is the dominant form of government on earth. Out of 193 United Nations member countries, 166 operate under a unitary system. That means a single central authority sits at the top of the political structure, and every other layer of government exists only at its pleasure.

  What does it actually mean for a government to be unitary? And how did one country's particular answer to a medieval war give rise to a model now used across most of the world? Those are the questions this documentary follows.

• 2. France and the Origin

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  The Hundred Years' War did not simply end a long conflict between France and England. It generated a surge of national feeling that reshaped what France was. That emotional cohesion accelerated a transformation already underway: from a feudal monarchy held together by noble loyalties into a single, centrally governed state.

  France became the model, and then the exporter. Through conquest during and after the Napoleonic Wars, the French spread the unitary structure across Europe. Through the vast French colonial empire, the model traveled further still. The mark of that legacy is still visible today in the prefect system, where a representative of the State sits in each department, responsible for carrying out central government policy at the local level.

• 3. What Central Authority Means

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  A unitary state's defining feature is that the central government holds supreme power. It may create administrative divisions, reshape them, or abolish them entirely. Any powers held by regional or local governments exist only because the central government chose to delegate them.

  Devolution, the transfer of certain powers to regional bodies through legislation, can look substantial in practice. But the critical legal fact is that the statute enabling devolution can be altered or revoked. A devolved government can have its decisions overridden, or its powers expanded, at the discretion of the center. The sub-national units have no guaranteed right to existence independent of the central authority.

• 4. Federalism as the Contrast

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  To understand what a unitary state is, it helps to see what it is not. In a federation, the regional or provincial governments share power with the central government as equal actors under a written constitution. Amending that constitution requires the consent of both levels.

  That single requirement changes everything. In a federation, sub-national units have a constitutionally protected right to exist and to exercise certain powers. The central government cannot unilaterally strip those rights away. In a unitary state, no such protection exists. The Parliament holds the card, and the regions hold only what the Parliament is willing to lend.

• 5. Unitary States in Practice

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  The United Kingdom offers one of the clearest illustrations of how a unitary state can accommodate significant regional autonomy while remaining structurally unitary. Scotland, Wales, and Northern Ireland each hold devolved powers and operate their own institutions. Yet those arrangements rest entirely on acts of the Parliament of the United Kingdom, which retains the legal authority to alter or abolish devolution unilaterally.

  Spain follows a similar pattern: devolved powers exist and are exercised, but they flow from the central government's delegation rather than from a constitutional compact that the regions co-own. Some unitary states take yet more distinctive forms, including theocracies and combined theocratic-presidential systems, showing how much variation can exist within the broad category.