What is Political Science and What Does it Study?

Maybe you clicked on this because a professor mentioned “political science” as a possible major, or because a news debate about elections, power, or policy left you wondering who actually studies these things for a living. There’s a specific kind of confusion that comes from hearing terms like “the state,” “sovereignty,” or “political behavior” tossed around as if everyone already understands them, when in reality most people never got a clear, grounded explanation of what this discipline actually covers. You might feel like political science is just “watching the news” dressed up in academic language, or worse, that it’s too abstract to matter to your daily life. That uncertainty is common, and it usually comes from never having seen the field’s actual boundaries laid out in plain terms.

This confusion matters because political science touches almost everything that shapes how you live: the laws you follow, the taxes you pay, the wars that start or end, and the institutions that decide who gets resources and who doesn’t. When people don’t understand what the discipline studies, they often either dismiss it as pure opinion or assume it’s identical to journalism or history, which leaves them unequipped to evaluate political claims critically. This gap shows up constantly in daily life, from misunderstanding how a bill becomes law to misjudging why one country’s government looks nothing like another’s. The stakes are real because political literacy shapes how people vote, argue, and participate in civic life, and a discipline built specifically to study power and governance deserves a clear definition rather than vague assumptions.

So what exactly does this field examine, and why does it matter so much right now?

This article will walk through the core definition of political science, its major subfields, its research methods, and how it differs from related disciplines, giving you a grounded answer to what political science actually studies.

What Is Political Science, Exactly?

Political science is the systematic, evidence-based study of governments, power, public policy, and political behavior across societies. It examines how authority is gained, exercised, and constrained, and how individuals, institutions, and nations interact within political systems.

According to the American Political Science Association, political science studies “governments, public policies and political processes, systems, and political behavior,” making it distinct from purely descriptive journalism or historical narration. The discipline treats politics as something that can be observed, compared, and theorized about using empirical methods alongside normative reasoning. Political scientist David Easton famously defined politics as the “authoritative allocation of values,” a framing that shifted the field toward analyzing decision-making processes rather than just describing institutions.

Unlike a purely philosophical inquiry into justice or a purely historical account of past regimes, political science blends both traditions with scientific rigor. It asks not only “what should government do?” but also “why do governments actually behave the way they do, and what can we predict about future political outcomes?” This dual focus on normative questions and empirical analysis is part of what makes the field so broad, spanning everything from ancient political philosophy to modern statistical models of voting behavior.

What Are the Main Subfields of Political Science?

Political science divides into several core subfields, each focusing on a distinct dimension of political life. Most departments organize their curriculum around four to six major branches, though the exact labels vary by institution.

• Political theory: examines foundational questions about justice, liberty, and legitimate authority through both classical and contemporary philosophical texts.
• Comparative politics: studies and contrasts political systems across countries to identify patterns in institutional design and government performance.
• International relations focuses on interactions between states, international organizations, and non-state actors like multinational corporations.
• American politics (or domestic politics in other contexts) analyzes a specific country’s institutions, elections, and policymaking processes in depth.
• Public policy and administration examines how governments design, implement, and evaluate specific policies affecting citizens’ lives.
• Political methodology develops the statistical and research tools used to test hypotheses about political behavior and institutions.

Each of these subfields overlaps with the others constantly. A scholar studying comparative politics might rely heavily on international relations theory to explain a country’s foreign policy, while someone in political methodology develops tools that get applied across every other subfield. This interconnectedness is part of why political science departments often require students to sample multiple subfields before specializing.

How Does Political Theory Explore Power and Justice?

Political theory investigates the philosophical foundations of governance, asking what makes authority legitimate and how societies should distribute rights, freedoms, and obligations. It draws on thinkers ranging from ancient Greece to contemporary philosophy.

This subfield is less about predicting political outcomes and more about clarifying the concepts that underpin political life, such as justice, equality, and sovereignty. Classical theorists like Aristotle and Machiavelli asked what constitutes a good regime, while modern theorists like John Rawls reshaped debates about distributive justice with his concept of the “veil of ignorance,” a thought experiment for designing fair institutions. Political theory also engages critically with contemporary political writings, subjecting them to re-examination in light of ongoing events.

Beyond abstract philosophy, political theorists also study political ideologies as lived belief systems that shape real behavior. Liberalism, conservatism, socialism, and various strands of feminism and critical theory all fall under this umbrella, since each offers a distinct account of how power should be organized. Understanding these frameworks helps citizens recognize the underlying assumptions behind competing policy proposals, rather than treating political disagreements as simple personality clashes. This makes normative reasoning a practical skill, not just an academic exercise.

What Does Comparative Politics Actually Compare?

Comparative politics studies similarities and differences among political systems to understand why some governments function effectively while others fail or become unstable. It typically compares institutions, electoral systems, and political cultures across two or more countries.

Scholars in this subfield ask deceptively simple questions with complicated answers: why do some democracies remain stable for centuries while others collapse into authoritarianism within a decade? Comparative politics also examines electoral system design, since the choice between proportional representation and winner-take-all elections dramatically shapes party systems and governing coalitions. Researchers often build detailed case studies of single countries, then place those cases in dialogue with broader theories about democratization, state formation, or civil conflict.

This subfield gained enormous relevance in recent decades as scholars tried to explain waves of democratization, the rise of populist movements, and the persistence of authoritarian regimes in various regions. Comparative politics courses typically split into two formats: thematic comparisons of a specific institution across many countries, or deep single-country analyses that reveal how history and culture shape political outcomes. Either approach requires careful attention to context, since institutions that work well in one setting can fail entirely when transplanted elsewhere without adaptation.

What Does International Relations Study?

International relations examines how states, international organizations, and non-state actors interact across borders, with a particular focus on conflict, cooperation, trade, and diplomacy. It treats the international system itself as an object of study, separate from any single country’s domestic politics.

Core questions in this subfield include why wars start, how they end, and what role international law and institutions like the United Nations play in preventing or resolving conflict. Political scientist Kenneth Waltz helped popularize structural realism, a theory arguing that the anarchic structure of the international system, rather than individual leaders’ personalities, largely drives state behavior. As global interdependence has grown, scholars increasingly study world trade, foreign investment, and international finance alongside traditional security concerns.

International relations also covers foreign policy analysis, examining how individual states decide on national security strategy, nuclear deterrence, and defense spending. This area sits at the intersection of domestic politics and global structure, since a country’s internal political pressures often shape its external behavior just as much as international constraints do. Students in this subfield frequently examine historical case studies, from the Cold War’s bipolar order to contemporary debates about multilateral institutions, to test competing theories about why states cooperate or clash.

How Do Political Scientists Study Political Behavior?

Political behavior research examines how individuals form political attitudes, make voting decisions, and participate in civic life. This area blends political science with psychology and sociology to explain why people act politically the way they do.

Researchers in this space study voter turnout patterns, party identification, and the psychological roots of political polarization. Political scientist Robert Dahl contributed foundational work on democratic theory and pluralism, arguing that power in democratic societies is distributed among competing groups rather than concentrated in a single elite. Behavioral researchers also examine how media consumption, social networks, and group identity shape political preferences, often relying on large-scale surveys and experiments to test their hypotheses.

This subfield has become increasingly data-driven, using statistical models to identify which demographic and psychological factors best predict voting choices or protest participation. Some scholars focus specifically on political socialization, tracing how family, education, and early life experiences shape lifelong political identities. Others study elite behavior, examining how legislators, judges, and bureaucrats make decisions once they hold power, which connects behavioral research directly back to institutional analysis.

What Role Does Public Policy Play in Political Science?

Public policy analysis studies how governments design, implement, and evaluate specific responses to social problems, from healthcare to environmental regulation. It asks not just what policies exist, but whether they achieve their intended goals.

This subfield requires practical, applied skills: policy analysts often build cost-benefit models, evaluate program outcomes, and assess how bureaucracies implement legislation on the ground. Political economist Max Weber, though primarily known as a sociologist, shaped how political scientists think about bureaucracy, describing the rational-legal authority that underpins modern administrative states. Public policy scholars also examine the political process behind policymaking itself, asking why certain issues reach the government’s agenda while others remain ignored for decades.

What Research Methods Do Political Scientists Use?

Political scientists use a mix of qualitative and quantitative methods, including statistical modeling, case studies, comparative analysis, and formal theory, to test hypotheses about political phenomena. The choice of method depends on the research question and the type of evidence available.

1. Quantitative researchers build statistical models using survey data, election results, or historical datasets to identify patterns across many cases.
2. Qualitative scholars conduct in-depth case studies, tracing the specific historical and institutional processes behind a single political outcome.
3. Comparative case designs select several countries or time periods to isolate the factors that explain differing political outcomes.
4. Formal theorists use mathematical models, often drawing on game theory, to predict how rational actors will behave under given institutional rules.
5. Experimental researchers, an increasingly common approach, run controlled experiments to test how specific interventions shape political attitudes or behavior.

Political methodology itself functions as a subfield, dedicated to refining these tools and examining the philosophical bases of political inquiry. This includes debates about whether political science can ever achieve the predictive precision of natural sciences, given the complexity of human institutions and free will. Regardless of method, most political scientists share a commitment to evidence-based reasoning, distinguishing the discipline from purely ideological commentary.

How Does Political Science Differ From History and Law?

Political science overlaps with history and law but maintains distinct goals: it seeks generalizable patterns and theories, while history emphasizes particular events and law focuses on legal rules and their interpretation. These disciplines inform each other constantly without being interchangeable.

Historians typically reconstruct a detailed, chronological account of specific events, while political scientists use historical cases as evidence to build or test broader theories about institutions and behavior. Legal scholars analyze statutes, constitutions, and judicial decisions for their internal logic and precedent, while political scientists studying courts ask how judicial behavior fits into broader theories of institutional power. This means a political scientist might study the same Supreme Court case as a legal scholar, but ask a different question: not “was this ruling legally correct?” but “why did the justices decide this way, and what does it reveal about judicial politics?”

Political science also draws heavily on economics, sociology, anthropology, and psychology, since political behavior rarely occurs in isolation from these other social forces. This interdisciplinary character is part of what makes the field flexible enough to study everything from ancient empires to modern social media’s effect on elections. Students often find that a strong grounding in one adjacent discipline, such as economics or sociology, sharpens their political analysis considerably.

Why Does Studying Political Science Matter Today?

Political science equips people to critically evaluate power, policy, and governance at a moment when misinformation and polarization make civic literacy more valuable than ever. Understanding how institutions actually function helps citizens separate substantive debate from empty political theater.

Graduates and informed citizens alike benefit from recognizing patterns across political systems: knowing why some democracies backslide into authoritarianism, or why certain electoral rules produce more polarized legislatures, gives people tools to interpret current events rather than simply reacting emotionally to headlines. This knowledge translates into careers in public administration, journalism, law, diplomacy, and nonprofit advocacy, since nearly every sector interacts with government policy in some form. Political science training also builds transferable skills in research design, statistical analysis, and persuasive writing that extend far beyond any single career path.

FAQs about Political Science

What is the simplest definition of political science?

Political science is the systematic study of governments, public policies, political processes, and political behavior, using both empirical research and normative reasoning. It asks how power is gained, used, and constrained across different societies and institutions. Rather than simply describing events like a news report, the discipline builds theories that explain patterns across many cases and time periods. This includes everything from why certain electoral systems produce more stable governments to how individual citizens form their political identities. At its core, the field treats politics as something that can be studied rigorously, much like economics studies markets or sociology studies social structures, rather than treating political outcomes as random or purely a matter of opinion.

Is political science a science?

Political science uses scientific methods, including statistical analysis and hypothesis testing, but it also incorporates normative and interpretive approaches that differ from natural sciences. Many scholars argue it qualifies as a social science because it systematically observes patterns, builds testable theories, and revises conclusions based on evidence, much like economics or sociology. However, human behavior involves free will, cultural variation, and historical contingency, which makes precise prediction harder than in physics or chemistry. Because of this, the discipline blends quantitative modeling with qualitative case studies and philosophical reasoning about justice and legitimacy. This hybrid approach is part of why some departments house political science within social sciences while others place it closer to the humanities.

What careers can you pursue with a political science degree?

A political science degree opens doors to careers in public administration, law, journalism, diplomacy, campaign management, policy analysis, and nonprofit advocacy work. Many graduates go on to law school, since the discipline’s emphasis on argumentation and institutional analysis translates directly into legal reasoning. Others pursue graduate degrees in public policy or international affairs to work in government agencies, think tanks, or international organizations. The analytical and research skills developed through the major, including statistical literacy and persuasive writing, also transfer well into business, consulting, and communications roles. Because the field is so interdisciplinary, graduates often find flexibility across sectors rather than being locked into one narrow career track.

What is the difference between political science and international relations?

International relations is a subfield within the broader discipline of political science, focused specifically on interactions between states and global actors. While political science as a whole covers domestic institutions, political theory, and behavior, international relations narrows in on cross-border dynamics like war, diplomacy, and global economic policy. Some universities offer international relations as a standalone major, but the underlying theoretical tools, including game theory and institutional analysis, come directly from political science’s broader toolkit. Students interested in global affairs, foreign policy, or international organizations typically concentrate in this subfield while still taking foundational political science coursework. In short, international relations is a specialized lens applied to the same core discipline.

Who are some influential political scientists?

Influential figures include Robert Dahl, known for his work on democratic pluralism, and David Easton, who defined politics as the authoritative allocation of values. Kenneth Waltz shaped international relations theory through his structural realist framework, while Max Weber’s analysis of bureaucracy continues to inform public administration research. John Rawls, though primarily a philosopher, deeply influenced political theory through his work on distributive justice and fairness. These scholars represent different subfields, showing how foundational theories emerged from distinct methodological traditions within the discipline. Their combined influence illustrates why political science remains such a broad, interdisciplinary field rather than a single unified approach.

How is political science different from public administration?

Public administration is often treated as an applied branch of political science, focusing specifically on how government agencies implement policy and manage bureaucratic operations. While political science broadly studies power, institutions, and behavior across many contexts, public administration narrows in on practical questions like budgeting, personnel management, and program evaluation within government bureaucracies. Some universities house public administration as a separate department or professional school, distinct from the academic political science department. Students pursuing careers directly in government service often choose public administration for its more hands-on, practical policy training, while those interested in broader theoretical or comparative questions stay within traditional political science programs. Both fields overlap considerably and often share faculty and coursework.

Bibliography

• American Political Science Association. (2024). What Is Political Science? APSAnet.org.
• Britannica, T. Editors of Encyclopaedia. (2026). Political science: Fields, History, Theories, and Facts. Encyclopaedia Britannica.
• Dahl, R. A. (1961). Who Governs? Democracy and Power in an American City. Yale University Press.
• Easton, D. (1953). The Political System: An Inquiry into the State of Political Science. Alfred A. Knopf.
• Rawls, J. (1971). A Theory of Justice. Harvard University Press.
• Waltz, K. N. (1979). Theory of International Politics. Addison-Wesley.
• Weber, M. (1922). Economy and Society: An Outline of Interpretive Sociology. University of California Press (translated edition).
• University of Washington, Department of Political Science. What Is Political Science? Polisci.washington.edu.