Social Democratic Party of Germany in the context of Klaus Fuchs

Federal elections were held in Germany on 19 January 1919 to elect a national constituent assembly that would write a new constitution for Germany following the collapse of the German Empire at the end of World War I. The election, which took place amid the sometimes violent political upheaval of the German revolution, used a form of proportional representation, lowered the voting age to 20 and allowed women to vote for the first time.

With the exception of the Social Democratic Party (SPD) and the Centre Party (which ran under the name 'Christian People's Party'), the major parties which took part in the election were newly formed from elements of parties that had been active during the German Empire. The three-week-old Communist Party of Germany (KPD) chose not to participate.

The German Democratic Party (Deutsche Demokratische Partei, DDP) was a liberal political party in the Weimar Republic, considered centrist or centre-left. Along with the right-liberal German People's Party (Deutsche Volkspartei, DVP), it represented political liberalism in Germany between 1918 and 1933. It was formed in 1918 from the Progressive People's Party and the liberal wing of the National Liberal Party, both of which had been active in the German Empire.

After the formation of the first German state to be constituted along pluralist-democratic lines, the DDP took part as a member of varying coalitions in almost all Weimar Republic cabinets from 1919 to 1932. Before the Reichstag elections of 1930, it united with the Volksnationale Reichsvereinigung, which was part of the national liberal Young German Order (Jungdeutscher Orden). From that point on the party called itself the German State Party (Deutsche Staatspartei, DStP) and retained the name even after the Reich Association left the party. Because of the connection to the Reich Association, members of the left wing of the DDP broke away from the party and toward the end of the Republic founded the Radical Democratic Party, which was unsuccessful in parliament. Others joined the Social Democratic Party of Germany (SPD).

Strike action, also called labor strike, labour strike in British English, or simply strike, is a work stoppage caused by the mass refusal of employees to work. A strike usually takes place in response to employee grievances. Strikes became common during the Industrial Revolution, when mass labor became important in factories and mines. As striking became a more common practice, governments were often pushed to act (either by private business or by union workers). When government intervention occurred, it was rarely neutral or amicable. Early strikes were often deemed unlawful conspiracies or anti-competitive cartel action and many were subject to massive legal repression by state police, federal military power, and federal courts. Many Western nations legalized striking under certain conditions in the late 19th and early 20th centuries.

Strikes are sometimes used to pressure governments to change policies. Occasionally, strikes destabilize the rule of a particular political party or ruler; in such cases, strikes are often part of a broader social movement taking the form of a campaign of civil resistance. Notable examples are the 1980 Gdańsk Shipyard and the 1981 Warning Strike led by Lech Wałęsa. These strikes were significant in the long campaign of civil resistance for political change in Poland, and were an important mobilizing effort that contributed to the fall of the Iron Curtain and the end of communist party rule in Eastern Europe. Another example is the general strike in Weimar Germany that followed the March 1920 Kapp Putsch. It was called by the Social Democratic Party (SPD) and received such broad support that it resulted in the collapse of the putsch.

The Communist Party of Germany (German: Kommunistische Partei Deutschlands, pronounced [kɔmuˈnɪstɪʃə paʁˈtaɪ ˈdɔʏtʃlants] ; KPD [ˌkaːpeːˈdeː] ) was the major far-left political party in the Weimar Republic during the interwar period, an underground resistance movement in Nazi Germany, and a minor party in Allied-occupied Germany and West Germany during the post-war period until it merged with the SPD in the Soviet occupation zone in 1946 and was banned by the West German Federal Constitutional Court in 1956.

The construction of the KPD began in the aftermath of the First World War by Rosa Luxemburg's and Karl Liebknecht's faction of the Independent Social Democratic Party of Germany (USPD) who had opposed the war and the Majority Social Democratic Party of Germany (MSPD)'s support of it.

Hanover Region (German: Region Hannover) is a district in Lower Saxony, Germany. It is bounded by (from the north and clockwise) the districts of Heidekreis, Celle, Gifhorn, Peine, Hildesheim, Hameln-Pyrmont, Schaumburg and Nienburg.

The Hanover Region district has a unique legal status among the districts of Lower Saxony. It includes the city of Hanover (the state capital) which has the same privileges as a kreisfreie Stadt, a city that is not part of a district. As a consequence, the district is much larger in population than any other district of the state. Its administrative body is the regional parliament (Regionsparlament), headed by the regional president (Regionspräsident), which since 2021 is Steffen Krach (SPD). The members of the regional parliament are elected once every five years and the regional president is elected also every five years in local elections.

The Party of European Socialists (PES) is a social democratic European political party.

The PES comprises national-level political parties from all the European economic area states (EEA) plus the United Kingdom. This includes major parties such as the Social Democratic Party of Germany, the French Socialist Party, the British Labour Party, the Italian Democratic Party, the Portuguese Socialist Party, the Romanian Social Democrat Party and the Spanish Socialist Workers' Party. Parties from a number of other European countries and from the Mediterranean region are also admitted to the PES as associate or observer parties. Most member, associate, and observer parties are members of the wider Progressive Alliance or Socialist International.

Eisenach (German pronunciation: [ˈaɪzənax] ) is a town in Thuringia, Germany with 42,000 inhabitants, 50 kilometres (31 miles) west of Erfurt, 70 km (43 miles) southeast of Kassel and 150 km (93 miles) northeast of Frankfurt. It is the main urban centre of western Thuringia, and bordering northeastern Hessian regions, is near the former Inner German border. A major attraction is Wartburg castle, which has been a UNESCO World Heritage Site since 1999.

Eisenach was an early capital of Thuringia in the 12th and 13th centuries. St. Elizabeth lived at the court of the Ludowingians here between 1211 and 1228. Later Martin Luther came to Eisenach and translated the Bible into German. In 1685 Johann Sebastian Bach was born here. During the early modern period Eisenach was a residence of the Ernestine Wettins and was visited by numerous representatives of Weimar classicism like Johann Wolfgang Goethe. In 1869 the SDAP, one of the two precursors of the Social Democratic Party of Germany (SPD), was founded in Eisenach.

Gotha (German pronunciation: [ˈɡoːtaː] ) is the fifth-largest city in Thuringia, Germany, 20 kilometres (12 miles) west of Erfurt and 25 km (16 miles) east of Eisenach with a population of 44,000. The city is the capital of the district of Gotha and was also a residence of the Ernestine Wettins from 1640 until the end of monarchy in Germany in 1918. The House of Saxe-Coburg and Gotha originating here spawned many European rulers, including the royal houses of the United Kingdom, Belgium, Portugal (until 1910) and Bulgaria (until 1946).

In the Middle Ages, Gotha was a rich trading town on the trade route Via Regia and between 1650 and 1850, Gotha saw a cultural heyday as a centre of sciences and arts, fostered by the dukes of Saxe-Gotha. The first duke, Ernest the Pious, was famous for his wise rule. In the 18th century, the Almanach de Gotha was first published in the city. The publisher Justus Perthes and the encyclopedist Joseph Meyer made Gotha a leading centre of German publishing around 1800. In the early 19th century, Gotha was a birthplace of the German insurance business. The SPD was founded in Gotha in 1875 by merging two predecessors. In that period Gotha became an industrial centre, with companies such as the Gothaer Waggonfabrik, a producer of trams and later aeroplanes.

The Federal Republic of Germany has a plural multi-party system. Historically, the largest by members and parliament seats are the Christian Democratic Union (CDU), with its sister party, the Christian Social Union (CSU) and Social Democratic Party of Germany (SPD). Germany also has a number of other parties, in recent history most importantly the Free Democratic Party (FDP), Alliance 90/The Greens, The Left, and more recently the Alternative for Germany (AfD). The federal government of Germany often consisted of a coalition of a major and a minor party, specifically CDU/CSU and FDP or SPD and FDP, and from 1998 to 2005 SPD and Greens. From 1966 to 1969, from 2005 to 2009, from 2013 to 2021 and since 2025, the federal government consisted of a coalition of the two major parties, called a grand coalition.

Coalitions in the Bundestag and state legislatures are often described by party colors. Party colors are red for the Social Democratic Party, green for Alliance 90/The Greens, yellow for the Free Democratic Party, purple (officially red, which is customarily used for the SPD) for the Left, light blue for the AfD, and black and blue for the CDU and CSU respectively.

Germany is a democratic and federal parliamentary republic, where federal legislative power is vested in the Bundestag (the parliament of Germany) and the Bundesrat (the representative body of the Länder, Germany's regional states).

The federal system has, since 1949, been dominated by the Christian Democratic Union (CDU) and the Social Democratic Party of Germany (SPD). The judiciary of Germany is independent of the executive and the legislature, while it is common for leading members of the executive to be members of the legislature as well. The political system is laid out in the 1949 constitution, the Grundgesetz (Basic Law), which remained in effect with minor amendments after German reunification in 1990.

Orthodox Marxism is the body of Marxist thought which emerged after the deaths of Karl Marx and Friedrich Engels in the late 19th century, expressed in its primary form by Karl Kautsky. Kautsky's views of Marxism dominated the European Marxist movement for two decades, and orthodox Marxism was the official philosophy of the majority of the socialist movement as represented in the Second International until the First World War in 1914, whose outbreak caused Kautsky's influence to wane and brought to prominence the orthodoxy of Vladimir Lenin. Orthodox Marxism aimed to simplify, codify and systematize Marxist method and theory by clarifying perceived ambiguities and contradictions in classical Marxism.

Orthodox Marxism maintained that Marx's historical materialism was a science which revealed the laws of history and proved that the collapse of capitalism and its replacement by socialism were inevitable. The implications of this deterministic view were that history could not be "hurried" and that politically workers and workers' parties must wait for the material economic conditions to be met before the revolutionary transformation of society could take place. For example, this idea saw the Social Democratic Party of Germany (SPD) adopt a gradualist approach, taking advantage of bourgeois parliamentary democracy to improve the lives of workers until capitalism was brought down by its objective internal contradictions.

Rosa Luxemburg (/ˈlʌksəmbɜːrɡ/ LUK-səm-burg; Polish: Róża Luksemburg [ˈruʐa ˈluksɛmburk] ; German: [ˈʁoːza ˈlʊksm̩bʊʁk] ; 5 March 1871 – 15 January 1919) was a Polish and naturalised-German Marxist theorist and revolutionary. She was a leading theorist of the Social Democratic Party of Germany (SPD) and later co-founded the anti-war Spartacus League, which evolved into the Communist Party of Germany (KPD). An influential member of the international socialist movement, she is remembered for her writings on imperialism and revolution, and as a champion of socialist democracy who famously stated, "Freedom is always and exclusively freedom for the one who thinks differently."

Born and raised in Russian-ruled Poland to a secular Jewish family, Luxemburg became active in revolutionary politics in her youth. She co-founded the Social Democracy of the Kingdom of Poland and Lithuania (SDKPiL), a party that rejected Polish nationalism in favour of an international class struggle. After moving to Germany in 1898, she became the foremost voice of the SPD's revolutionary wing. In her 1900 pamphlet Social Reform or Revolution?, she defended the necessity of revolution against the reformist theories of Eduard Bernstein, arguing that the struggle for reforms was a means to an end, not an end in itself. Inspired by the 1905 Russian Revolution, she developed a theory of the mass strike as the proletariat's most important revolutionary tool, emphasizing the spontaneous creativity of the working class.

The Social Democratic Workers' Party of Germany (German: Sozialdemokratische Arbeiterpartei Deutschlands, SDAP) was a Marxist socialist political party in the North German Confederation during unification.

Founded in Eisenach in 1869, the SDAP endured through the early years of the German Empire. Often termed the Eisenachers, the SDAP was one of the first political organizations established among the nascent German labor unions of the 19th century. It officially existed under the name SDAP for only six years (1869–1875). However, through name changes and political partnerships, its lineage can be traced to the present-day Social Democratic Party of Germany (SPD).

The Gotha Program (German: Gothaer Programm) was the party platform adopted by what would become the Social Democratic Party of Germany (SPD) at its initial conference, held in the city of Gotha from 22 to 27 May 1875. Written by Wilhelm Liebknecht, the program was the result of a compromise between the two founding factions of the party: the Marxist-influenced Social Democratic Workers' Party (SDAP), known as the "Eisenachers", and the General German Workers' Association (ADAV), founded by Ferdinand Lassalle.

The program called for universal suffrage, freedom of association, limits on the working day, and other laws protecting the rights and health of workers. While its immediate demands were radically democratic for the time, the Gotha Program was strongly influenced by Lassalleanism, declaring the party's intention to pursue its goals "by every legal means" and calling for the establishment of state-aided producer co-operatives.

The General German Workers' Association (German: Allgemeiner Deutscher Arbeiter-Verein, ADAV) was a German political party founded on 23 May 1863 in Leipzig, Kingdom of Saxony by Ferdinand Lassalle. It was the first organized mass working-class party in history.

The organization existed by this name until 1875, when it combined with the Social Democratic Workers' Party of Germany (SDAP) to form the Socialist Workers' Party of Germany. This unified organization was renamed soon thereafter the Social Democratic Party of Germany (SPD), which presently remains in existence and dates its origins to the founding of the ADAV. Its Austrian part would become the SPÖ.

Adolf Reichwein (3 October 1898 – 20 October 1944) was a German educator, economist, and cultural policymaker for the SPD, who resisted the policies of Nazi Germany.

The German workers' and soldiers' councils of 1918–1919 (German: Deutsche Arbeiter- und Soldatenräte) were short-lived revolutionary bodies that spread the German revolution to cities across the German Empire during the final days of World War I. Meeting little to no resistance, they formed quickly, took over city governments and key buildings, caused most of the locally stationed military to flee and brought about the abdications of all of Germany's ruling monarchs, including Emperor Wilhelm II, when they reached Berlin on 9 November 1918.

Although the communist Spartacus League and the left wing of the Independent Social Democratic Party (USPD) wanted to set up a system of council communism in Germany, they were a minority in the councils. Most members wanted an end to the war and to German militarism and the establishment of a parliamentary republic dominated by the moderate Social Democratic Party (SPD). Germany's interim national revolutionary government, the Council of the People's Deputies, was initially a coalition of the SPD and the USPD, but in it and in the majority of the other councils across Germany, the SPD was able to keep the far left on the sidelines. During the two large gatherings of workers' and soldiers' councils in Berlin, the voting generally followed the wishes of the SPD leadership. Crucially, and against the will of the radical left, they were able to schedule an election for a national assembly that would allow all Germans to determine the country's future form of government.

Friedrich Ebert ([ˈfʁiːdʁɪç ˈeːbɐt] ; 4 February 1871 – 28 February 1925) was a German politician of the Social Democratic Party (SPD) who served as the first president of Germany from 1919 until his death in 1925.

Ebert was elected leader of the SPD on the death in 1913 of August Bebel. In 1914, shortly after he assumed leadership, the party became deeply divided over Ebert's support of war loans to finance the German war effort in World War I. A moderate social democrat, Ebert was in favour of the Burgfrieden, a political policy that sought to suppress discord over domestic issues among political parties in order to concentrate all forces in society on the conclusion of the war effort. He tried to isolate those in the party opposed to war and advocated a split.