What Is Federalism? Dividing Power Between Central and Local Government

The Basic Concept: Sharing Sovereignty

Federalism is a system of government in which sovereignty — the ultimate authority to govern — is constitutionally divided between at least two levels of government: a central (federal or national) government and constituent units such as states, provinces, Länder, or cantons. Each level has its own sphere of authority, defined by the constitution, and neither can unilaterally abolish the other. This distinguishes federalism from both unitary systems (where a central government may delegate power to sub-units but retains the authority to revoke it) and confederations (where constituent units retain sovereignty and the central body depends on their cooperation).

Federalism emerged as a solution to the problem of governing large, diverse territories while preserving some degree of local autonomy. The United States, created from thirteen colonies with distinct histories and interests, adopted a federal constitution in 1787 partly to unite them under shared governance while preserving state authority. Today, federal systems govern approximately 40% of the world's population, including the United States, Germany, Australia, Canada, Brazil, India, and — in a complex sui generis form — the European Union.

Constitutional Division of Powers

Federal constitutions divide government powers among different categories:

• Enumerated (exclusive federal) powers: Powers explicitly granted to the federal government, typically including defense, foreign affairs, monetary policy, interstate commerce, and immigration. In the U.S. Constitution, these are listed in Article I, Section 8.
• Reserved (exclusive state) powers: Powers retained by states or sub-units. The U.S. Tenth Amendment states that powers not delegated to the federal government nor prohibited to states are reserved to the states or the people. State powers traditionally include education, most criminal law, family law, land use, and intrastate commerce.
• Concurrent powers: Powers that both levels may exercise, such as taxation, the establishment of courts, and environmental regulation. Where federal and state law conflict in a concurrent area, federal law typically prevails (the Supremacy Clause in the U.S. Constitution).
• Intergovernmental relations: Much modern governance falls in gray areas requiring cooperation — health care, environmental protection, transportation infrastructure — leading to complex intergovernmental arrangements.

Cooperative vs. Competitive Federalism

Cooperative federalism (also called "marble cake federalism") describes systems where federal and state governments work together to implement shared programs, with federal funding and standards and state administration. The New Deal and Great Society programs expanded cooperative federalism dramatically in the United States: federal grants to states for Medicaid, highway construction, education, and housing came with requirements that shaped state policy. Today, federal grants represent about a quarter of state government revenues.

Cooperative federalism can improve uniformity and enable programs that individual states could not finance alone, but critics argue it distorts state priorities (states chase federal grant money even for lower priorities), creates administrative complexity, and can erode state autonomy when federal funding is conditioned on accepting federal policies.

Competitive federalism (or "laboratories of democracy," in Justice Louis Brandeis's famous phrase) treats states as competing entities whose policy experimentation benefits the whole system. States compete to attract residents, businesses, and investment by offering favorable tax rates, regulatory environments, and public services. When Massachusetts enacted universal health insurance in 2006, it served as a policy experiment that informed the design of the Affordable Care Act (ACA) at the federal level. California's pioneering environmental regulations have repeatedly influenced federal standards.

Critics of competitive federalism argue that interstate competition creates a "race to the bottom" — states compete by weakening labor protections, environmental regulations, and corporate taxes in ways that benefit business interests at the expense of workers and communities. The extent to which interstate competition produces beneficial experimentation versus destructive races to the bottom is an empirically contested question.

The U.S. Federal System: Evolution and Tensions

The U.S. federal system has evolved dramatically from its founding design. The original Constitution established a relatively limited federal government with enumerated powers. The Civil War and Reconstruction amendments (13th, 14th, 15th) transformed the system by applying federal protections for rights against states. The New Deal expanded federal regulatory and spending power. The Great Society further expanded federal social programs. The Civil Rights Act of 1964 used federal power to dismantle state systems of racial segregation.

The Rehnquist and Roberts Supreme Courts initiated a modest "federalism revolution," striking down some federal legislation as exceeding Congress's commerce power and reviving state sovereign immunity doctrine. But federal power remains enormously expanded compared to the founding era. The ongoing tension between federal authority and state autonomy — over issues like marijuana legalization, immigration enforcement, health policy, and voting rights — reflects the Constitution's deliberate ambiguity about the precise allocation of powers.

The European Union: A Sui Generis Federal System

The European Union is not a federal state but has federal characteristics that make it a uniquely important case. The EU has its own legislature (Parliament and Council), executive (Commission), judiciary (Court of Justice), currency (for eurozone members), and exclusive competences (trade policy, competition law, monetary policy for eurozone). Member states have transferred significant sovereignty in these areas.

The EU's subsidiarity principle — enshrined in the Treaty of Maastricht — holds that the EU should act only when objectives cannot be sufficiently achieved by member states and can be better achieved at the EU level. This principle reflects the federalist logic of matching the scope of decision-making to the scope of the problem. However, the EU lacks some key attributes of a federal state: it has no direct taxing power, no unified foreign and defense policy, and member states retain ultimate sovereignty (evidenced by Brexit). The EU's evolution — toward greater integration or toward renationalization — remains one of the central political questions of European politics.

Advantages and Disadvantages of Federalism

Advantages:

• Policy experimentation: States can try different policies; successful ones can be adopted nationally, failed ones can be abandoned without affecting the whole country.
• Local preference accommodation: A federal system can accommodate diverse preferences across a large territory — rural agricultural states and urban industrial states can have different policies reflecting their different needs and values.
• Protection against tyranny: The Founders designed federalism partly as a check on concentrated power. Multiple power centers make it harder for any single faction or government to impose its will on the whole country.
• Citizen engagement: State and local governments are closer to citizens, potentially more responsive to local needs and more accessible to civic participation.

Disadvantages:

• Coordination problems: Some problems — climate change, pandemic response, financial regulation — require coordinated national or international action that decentralized federalism makes difficult to achieve.
• Interstate inequality: The quality of public services — education, health care, infrastructure — varies dramatically across states, often correlating with income. Children in poor states receive substantially less public education funding than those in wealthy states.
• Potential for state-level rights violations: History demonstrates that state autonomy has sometimes been used to perpetuate racial discrimination, suppress labor rights, and deny civil liberties. Federal power has often been the mechanism for enforcing rights against state governments.
• Complexity and confusion: Citizens in federal systems must navigate multiple layers of law and government, creating compliance burdens for individuals and businesses operating across state lines.