A federation (or federal state) is a form of government in which authority is constitutionally shared between a national government and self-governing subunits—commonly called states, provinces, cantons, Länder, or republics. The defining feature is that the division of powers is entrenched in a written constitution and cannot be unilaterally altered by either level, distinguishing federations from unitary states (where regional powers are delegated and revocable) and from confederations (where the central body derives its authority from member states and is generally weaker).
Federations typically share several institutional features:
- A written constitution enumerating exclusive, concurrent, and residual powers.
- A bicameral legislature in which one chamber represents the population and another represents the constituent units (e.g., the U.S. Senate, the German Bundesrat, the Australian Senate).
- A constitutional court or equivalent body to adjudicate jurisdictional disputes between levels of government.
- Direct application of central law to citizens, rather than only to member states.
Prominent federations include the United States (since the 1789 Constitution), Switzerland (Federal Constitution of 1848, revised 1999), Germany, Canada, Australia, India, Brazil, Mexico, Nigeria, Argentina, Belgium, the United Arab Emirates, Malaysia, Ethiopia, and Russia. Each varies significantly in the degree of decentralization: Switzerland and Canada are often described as highly decentralized, while India and Malaysia feature stronger central authorities and are sometimes labeled quasi-federal.
Federalism is frequently chosen to manage territorial diversity—linguistic (Belgium, Canada), ethnic (Ethiopia, India), or religious—or to unify previously independent polities (Germany 1871, Australia 1901). Critics note risks of policy fragmentation, fiscal imbalance between units, and entrenched regional inequality; proponents emphasize subsidiarity, laboratories of policy experimentation, and protection of minority self-rule.
In international relations and Model UN contexts, federations may complicate treaty implementation, since subnational units sometimes hold jurisdiction over matters like environmental regulation, education, or policing that are subject to international agreements.
Example
When Belgium ratified the 2016 Comprehensive Economic and Trade Agreement (CETA) with Canada, the regional parliament of Wallonia initially blocked approval, illustrating how federations distribute treaty-making authority across subnational governments.
Frequently asked questions
In a federation, the central government derives authority directly from the constitution and acts on individual citizens. In a confederation, the central body is created by member states and generally exercises only powers those states delegate, with limited direct authority over citizens.
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