Sozialdemokratische Partei Deutschlands (SPD).

The German Social Democratic Party (German: Sozialdemokratische Partei Deutschlands, abbreviated SPD) is the oldest political party in Germany founded by Karl Kautsky, Rosa Luxemburg and Karl Liebknecht in 1875 with an ideology based on the basic thoughts of Karl Marx and Ferdinand Lasselle including the thoughts of Ferdinand Bebel and Wilhelm Liebknecht, After World War II, under the leadership of Kurt Schumacher the German Social Democratic Party changed its ideological basis to become a party that represents the interests of the working class and trade unions and gradually developed from working class socialism to Democratic socialism. This is reflected in the difference between the Heidelberg Program of 1925, which wanted to transform from a private capitalist system to ownership of the means of production to social or state ownership" with the Godesberg Program of 1959, which aimed to broaden and shift basic voters' political positions towards a more moderate nature.