International Working Union of Socialist Parties

The International Working Union of Socialist Parties (IWUSP; German: Internationale Arbeitsgemeinschaft Sozialistischer Parteien, IASP), also known as the ​21⁄2 International or the Munich International, is an international organization of socialist political parties. It is currently based in the Bavarian city of Munich. It is one of the successors to the Second International, which was largely rendered defunct by the Great War and the subsequent split between reformists and revolutionaries.
The IWUSP has a cooperative relationship with the Communist International, but is nonetheless fully independent and sometimes divergent on international issues. It has two member parties that participate in the governments of INPROV member states. Those parties are the United Social Democratic Party of Germany (VSPD), and the Social Democratic Workers' Party of Austria (SDAPÖ), which chiefly governs the Austrian Socialist Republic. The organization actively competes with its more moderate rival, the Labour and Socialist International, and additionally distinguishes itself by adhering strongly to anti-imperialism and anti-colonialism.
== Members ==
Country	
Country 	
Party 	
Entry	
Ideology
	Austria 	Social Democratic Workers' Party of Austria 	1921	Austromarxism
	Austria 	Czech Social Democratic Workers' Party in Austria 	1921	AustromarxismCzech minority interests
	Czechia 	German Social Democratic Workers' Party 	1921	Centrist MarxismGerman minority interests
	Denmark 	Social Democratic Federation 	1921	Democratic socialism
	Estonia 	Estonian Independent Socialist Workers' Party 	1921	Democratic socialismEstonian nationalism
	France 	French Section of the Workers' International 	1921	Socialism
	Germany 	United Social Democratic Party of Germany 	1921	Centrist Marxism
	United Kingdom 	Independent Labour Party 	1921	Centrist Marxism
	Hungary 	Socialist Workers' Party of Hungary 	1924	Democratic socialism
	Ireland 	Labour Party 	1921	Democratic socialismIrish nationalism
	Luxembourg 	Workers' Party of Luxembourg 	1921	Democratic socialism
	Netherlands 	Independent Socialist Party 	1928	Democratic socialism
	Norway 	Norwegian Labour Party 	1923	Revolutionary socialism
	Ottoman Sultanate	Independent Socialist Party 	1921	Democratic socialism
	Palestine 	Poale Zion 	1922	Centrist MarxismZionism
	Poland 	Independent Socialist Labour Party 	1922	Democratic socialism
	Poland 	General Jewish Labour Bund in Poland 	1921	SocialismAnti-Zionism
	Portugal 	Republican Party of the Democratic Left 	1930	Democratic socialism
	Romania 	Socialist Workers' Party of Romania 	1928	Democratic socialism
	Slovakia 	Hungarian-German Social Democratic Party 	1921	Democratic socialismHungarian-German minority interests
	Slovakia 	Social Democratic Workers' Party in Subcarpathian Rus'	1921	Democratic socialismRusyn minority interests
	Spain 	Spanish Socialist Workers' Party 	1921	Socialism
	Sweden 	Social Democratic Labour Party of Sweden 	1921	Democratic socialism
	Switzerland 	Social Democratic Party of Switzerland 	1921	Democratic socialism
	United States 	Socialist Party of America 	1928	Socialism
Category:International political organizations