Democracy is a system of collective decision making in which members of a political community have an appropriately equal role in determining decisions that are binding upon them. The word derives from the Greek demokratia, formed from demos, meaning people, and kratos, meaning rule or power. In modern political science, democracy is not defined solely by the existence of elections.
Elections are central to most contemporary democratic systems, but democratic government also involves political equality, meaningful competition, participation, accountability and procedures through which citizens can influence public authority. The Stanford Encyclopedia of Philosophy describes democracy generally as collective decision making characterised by a form of equality among participants at an essential stage of the decision making process. That definition deliberately accommodates different institutional arrangements, including direct voting, representative institutions, proportional representation and different constitutional structures. Democracy is therefore best understood as a family of political arrangements sharing a fundamental principle of political equality and popular participation rather than as one single institutional design.
The historical development of democracy is extensive and does not follow a single continuous institutional path. Ancient Athens is one of the most famous early examples because eligible citizens participated directly in assemblies and other political institutions, although Athenian citizenship excluded women, enslaved people and many residents. Roman republican institutions provided another historical model involving elections, assemblies and representative offices, although Roman political equality was highly limited by modern standards.
Modern democracy emerged through much longer processes involving constitutional government, parliamentary development, expansion of voting rights, political parties, mass literacy, organised civil society and struggles over citizenship. The expansion of suffrage was particularly important because early constitutional regimes frequently restricted political participation according to property, gender, race, religion or social status. Modern democracy therefore combines ancient ideas about popular rule with institutions that developed much later. Its contemporary meaning cannot simply be projected backwards onto historical systems whose definitions of political membership were substantially narrower.
A central principle of democracy is political equality. In its simplest electoral form, this means that citizens have votes of equal formal weight and that political office is accessible through procedures that do not arbitrarily privilege particular citizens. Political equality also raises more difficult questions about whether citizens possess genuinely equal opportunities to influence public decisions.
Formal one person one vote does not automatically guarantee equal political influence if some groups have radically greater access to political information, campaign resources, media exposure or political organisations. Democratic theory therefore contains competing accounts of what equality requires. Minimal conceptions emphasise competitive elections and basic political freedoms, while more expansive conceptions include equal participation, deliberation, representation, responsiveness and opportunities for political influence. The question of who belongs to the demos is also fundamental because a decision can be procedurally equal among participants while excluding people who are substantially affected by the resulting decision.
Democracy operates through several mechanisms that connect citizens with political authority. Elections allow citizens to choose among candidates or parties and provide a mechanism for removing governments. Political parties organise competing programmes, recruit candidates and aggregate interests. Legislatures deliberate and enact laws, while executives implement policy. Courts can interpret constitutional and legal rules, although the precise relationship between courts and democratic majorities differs among political systems.
Independent media and civil society organisations can provide information, criticism and channels for collective mobilisation. Public consultations, referendums, petitions and participatory institutions can create additional mechanisms of influence. Accountability is particularly important because democracy requires more than selecting rulers. Citizens need mechanisms through which officeholders can be scrutinised and potentially removed or constrained. The precise combination of these mechanisms varies considerably, which explains why democratic systems can differ substantially in electoral rules, constitutional structures, executive arrangements and opportunities for direct participation while still sharing democratic characteristics.
Democracy should be distinguished from majority rule because a majority decision is only one possible democratic decision procedure. A simple majority can determine an election or legislative vote, but democracy may also incorporate constitutional rights, proportional representation, judicial review, federalism, coalition government, supermajority requirements or consensus procedures. The distinction matters because unrestricted majority power can conflict with other democratic principles if a temporary majority attempts to prevent political competition or permanently exclude minorities from equal citizenship.
Democratic theory consequently contains a continuing tension between majority decision making and political equality. A majority must generally be able to govern, but democratic systems also need procedures that allow minorities to remain politically organised and capable of becoming future majorities. This is one reason modern democracies commonly combine electoral decision making with institutional constraints. Democracy is therefore not synonymous with whatever decision receives the largest number of votes. It is a broader institutional relationship between political equality, participation, competition, authority and accountability.
Representative government is the dominant form of democracy in large contemporary states because direct participation by every citizen in every legislative decision is generally impractical. Representative democracy divides political labour between citizens and elected officials. Citizens participate in elections and other political processes, while representatives deliberate, legislate and govern on their behalf. Representation nevertheless raises important questions about accountability and independence.
Representatives must possess enough independence to deliberate and make decisions, but they must also remain responsive to citizens and subject to electoral and institutional accountability. Political representation therefore cannot be reduced to simple instruction following. Bernard Manin identifies regular elections, a degree of representative independence, freedom for citizens to express political preferences and public deliberation as important characteristics of representative government. Modern democratic systems can also combine representative institutions with referendums, citizens initiatives, public consultations and other direct mechanisms.
Democracy also has a normative dimension concerning why popular rule is considered valuable. Arguments for democracy include political equality, protection against arbitrary domination, opportunities for participation, accountability of rulers, peaceful succession of political authority and the possibility of correcting governmental mistakes. Some theories also give democracy an epistemic value, arguing that inclusive participation can bring diverse information and perspectives into collective decision making. Other theories emphasise the development of citizens through participation and public reasoning.
These arguments do not establish that every democratic decision is correct or morally desirable. Democracies can make serious mistakes, produce unjust policies and marginalise minorities. Democratic institutions are therefore often combined with rights, constitutional protections and institutional checks. The legitimacy of democracy depends partly on the principle that people subject to collective political power should possess an appropriately equal role in authorising and contesting that power.
Democracy has many institutional forms, including direct democracy, representative democracy, participatory democracy, deliberative democracy, liberal democracy, constitutional democracy, social democracy, majoritarian democracy and consensus democracy. These categories describe different dimensions and should not automatically be treated as mutually exclusive systems. A country can be representative and liberal, constitutional and majoritarian, or representative and deliberative while also incorporating direct democratic mechanisms.
Direct democracy concerns how citizens make particular decisions; representative democracy concerns who makes decisions on an ongoing basis; liberal democracy concerns rights and limitations on political authority; constitutional democracy concerns the legal framework governing public power; majoritarian and consensus democracy concern how political power is organised and distributed; and social democracy primarily concerns a political and economic tradition combining democratic government with social protection and regulation of capitalism. Understanding democracy therefore requires distinguishing these dimensions rather than treating every democratic label as a competing definition of the same thing.
