Social democracy refers to a political tradition and institutional approach that combines democratic governance and a predominantly market-based economy with policies aimed at promoting social equality, social rights, and collective welfare ^[1][2]. It emphasizes the use of democratic institutions and public policy to regulate economic activity, redistribute income and wealth, provide social protection, and reduce socioeconomic inequalities ^[1]. Social democracy developed historically from socialist and labor movements, with reformist approaches increasingly favoring gradual change through parliamentary and democratic institutions rather than revolutionary transformation of the economic system ^[3]. Contemporary social democracy generally accepts private ownership and market competition while seeking to shape their social consequences through taxation, welfare provision, labor-market institutions, public services, and other forms of state intervention. Its institutional forms and policy priorities vary across countries and historical periods, reflecting differences in political institutions, labor organizations, economic structures, and conceptions of social justice. Social democracy therefore encompasses both an ideological tradition concerning democratic and social equality and a set of political and socioeconomic arrangements for pursuing these objectives.