Back الاتحاد الأممي للأحزاب الاشتراكية Arabic Segunda Internacional y Media AST Unió de Partits Socialistes per l'Acció Internacional Catalan Mezinárodní pracovní společenství socialistických stran Czech Internationale Arbeitsgemeinschaft Sozialistischer Parteien German Unión de Partidos Socialistas para la Acción Internacional Spanish Union des partis socialistes pour l'action internationale French Međunarodna radnička zajednica socijalističkih stranaka Croatian Unione dei Partiti Socialisti per l'Azione Internazionale Italian 第二半インターナショナル Japanese
International Working Union of Socialist Parties Internationale Arbeitsgemeinschaft Sozialistischer Parteien | |
|---|---|
| Founded | 1921 |
| Dissolved | 1923 |
| Succeeded by | Labour and Socialist International |
| Ideology | Centrist Marxism Socialism |
| Political position | Left-wing |
| Colors | Red |
The International Working Union of Socialist Parties (IWUSP; also known as the 2½ International or the Vienna International; German: Internationale Arbeitsgemeinschaft Sozialistischer Parteien, IASP) was a political international for the co-operation of socialist parties.