Compare different ways societies organize public authority.
Government systems answer questions about who makes laws, who leads, how leaders are chosen, how power is limited, and how local and national institutions relate. Real countries often combine features from several categories.




Democracy gives citizens a role in choosing leaders or decisions.
Learn MoreA republic has public offices that are not inherited as a monarchy.
Learn MoreA monarchy has a king, queen, emperor, or other hereditary sovereign.
Learn MoreParliamentary systems usually choose a prime minister through the legislature.
Learn MorePresidential systems elect or otherwise select a president separately from the legislature.
Learn MoreFederal systems divide authority between a national government and regional governments.
Learn MoreUnitary systems place ultimate constitutional authority at the national level.
Learn MoreAuthoritarian systems limit political competition and public control over rulers.
Learn MoreModern democracies usually rely on elections, law, institutions, rights, political competition, and some form of representation.
Many republics are democratic, but the word republic alone does not guarantee free elections or broad rights.
Absolute monarchies give the monarch extensive authority, while constitutional monarchies place governing power largely in elected institutions.
The executive depends on legislative support and may leave office after losing confidence or an election.
The president typically serves as both a major political leader and head of the executive branch, though exact powers vary.
The United States, Germany, India, Australia, and others use different federal arrangements.
Local or regional governments may still have substantial responsibilities, but their legal powers come from national law.