Eduard Bernstein is widely regarded as the father of modern social democracy. He was a German socialist and politician who revised Marxist theory to emphasize the importance of gradual reform and democratic processes.

Tony Blair served as Prime Minister of the United Kingdom from 1997 to 2007. He is known for his commitment to social democracy, which emphasizes a mixed economy, social welfare programs, and equality.

Gro Harlem Brundtland was the first female Prime Minister of Norway, serving three terms from 1981 to 1986, 1986 to 1989, and 1990 to 1996. She is known for her commitment to social democracy and her work on sustainable development.

Ludwig Erhard was a German politician who served as Chancellor from 1963 to 1966. He is associated with the concept of the 'social market economy,' which combines elements of capitalism and social welfare.

Hjalmar Branting is known as the 'father of Swedish social democracy.' He was a Swedish politician who served as Prime Minister from 1920 to 1925 and again from 1926 to 1928. He is credited with laying the foundation for Sweden's social welfare system.

François Mitterrand was a French President who served from 1981 to 1995. He is associated with the concept of 'social solidarity,' which emphasizes the importance of collective responsibility and support for the most vulnerable members of society.

Clement Attlee was a British Labour Party politician who served as Prime Minister from 1945 to 1951. He is known as the 'architect of the welfare state' in the United Kingdom, as he oversaw the establishment of the National Health Service and other social welfare programs.

Enrico Berlinguer was an Italian politician who served as the leader of the Italian Communist Party from 1972 to 1984. He is associated with the concept of 'democratic socialism,' which seeks to combine elements of socialism and democracy.

Mário Soares was a Portuguese politician who served as Prime Minister from 1976 to 1978 and again from 1983 to 1985. He is known as the 'father of the Portuguese Revolution,' as he played a key role in the transition to democracy after the fall of the authoritarian Estado Novo regime.

Felipe González was a Spanish politician who served as Prime Minister from 1982 to 1996. He is associated with the concept of 'social dialogue,' which emphasizes the importance of cooperation between government, labor unions, and employers in shaping economic and social policies.

Bruno Kreisky was an Austrian politician who served as Chancellor from 1970 to 1983. He is known as the 'father of the Austrian welfare state,' as he oversaw the expansion of social welfare programs and the establishment of a comprehensive healthcare system.

Poul Nyrup Rasmussen was a Danish politician who served as Prime Minister from 1993 to 2001. He is associated with the concept of 'flexicurity,' which combines flexible labor market policies with strong social safety nets.

Kalevi Sorsa was a Finnish politician who served as Prime Minister from 1972 to 1975, 1977 to 1979, and 1982 to 1987. He is known as the 'father of the Finnish welfare state,' as he oversaw the expansion of social welfare programs and the establishment of a comprehensive healthcare system.

Jóhanna Sigurðardóttir was an Icelandic politician who served as Prime Minister from 2009 to 2013. She is associated with the concept of 'responsible capitalism,' which emphasizes the importance of corporate social responsibility and environmental sustainability.

Einar Gerhardsen was a Norwegian politician who served as Prime Minister from 1945 to 1951, 1955 to 1963, and 1963 to 1965. He is known as the 'father of the Norwegian welfare state,' as he oversaw the establishment of a comprehensive social welfare system.