# Labour and Socialist International

The Labour and Socialist International (LSI) was an international organization of socialist and labourist parties, active between 1923 and 1940. The group was established through a merger of the rival Vienna International and the Berne International, and was the forerunner of the present-day Socialist International.
The LSI had a history of rivalry with the Communist International (Comintern), with which it competed over the leadership of the international socialist and labour movement. However, unlike the Comintern, the LSI maintained no direct control over the actions of its sections, being constituted as a federation of autonomous national parties.

## History
### Founding

Despite the hostility expressed by the Communist International, the left wing of the social democratic movement sought an international "union of the whole proletariat" through 1922. This initiative finally came to a close at the end of the year with the convocation of the 4th World Congress of the Comintern, which decisively rejected calls for a broad and inclusive international body.
This rejection by the Communist wing of the international socialist movement left the center and right — in the form of the Vienna International and the London International, respectively — to patch together their own joint international body. Planning for such a body began in January 1923, a month after the conclusion of the Comintern's 4th World Congress, with the Executive Committees of the Vienna and London groups issuing a joint statement condemning the Communists' decision. The two Executive Committees subsequently issued a convention call for a unification congress in May.
On May 21, 1923, some 620 delegates representing 41 socialist political parties in 30 countries was convened in Hamburg, Germany to bring about the unification of the two Internationals. A wide array of political tendencies were represented among these delegates, running the ideological gamut from activists in the left wing of the French Section of the Workers' International (SFIO) and the Independent Social Democratic Party of Germany (USPD) to moderate reformists of the British Labour Party.
The gathering was dominated by 80 delegates of the Social Democratic Party of Germany (SPD), including among its membership such esteemed leaders of the international socialist movement as Karl Kautsky, Eduard Bernstein, and Rudolf Hilferding. Other prominent figures in attendance included Arthur Henderson and Sidney Webb of the British Labour Party; Friedrich Adler and Otto Bauer, and Karl Renner of the Social Democratic Party of Austria (SPÖ); Emile Vandervelde and Camille Huysmans of the Belgian Labour Party (BWP); and the émigré Russian Mensheviks Pavel Axelrod, Raphael Abramovitch, and Fyodor Dan, among others.
The unity congress voted to establish itself as a new International under the name "Labour and Socialist International" (LSI). In marked difference from the Communist movement, no preconditions were established for admission, nor was any binding policy program adopted. Instead the Hamburg Congress issued a manifesto stating that the new International "must grow naturally from the process through which Socialist parties get adapted to one another." Total agreement on fundamental principles was not expected "at the moment of its birth," but the desire was voiced that establishment of the new international body would over time serve as "one of the most important conditions for the harmonizing of their views."

### Structure

The LSI was to remain a federation of fully independent and autonomous political parties — groups which were freely allowed under organizational statutes to determine their own internal policies and programs. The organization was modeled upon the old Second International, with supreme authority vested in the international congress, which could be convened at any time upon the demand of 10 or more affiliated parties, so long as these represented at least a quarter of the organization's voting strength.
Governance between congresses was to be conducted by an executive committee, with its participants elected by the member parties. The executive committee was given the power to elect its own chair and other officers, to determine the location for its central office, and to elect a 9-member Bureau for prior consideration of matters of concern in advance of meetings of the full Executive Committee. The executive committee was additionally to establish a 6-member special committee of local members residing at or near the seat of the committee, who were to be responsible for supervising the work of the Executive and its officers and arranging meetings of the Bureau and the executive committee.
The first Executive Committee, elected by the 1923 Hamburg Congress, included Arthur Henderson of the British Labour Party as chairman, Harry Gosling of the British Labour Party as treasurer, with the Austrian Friedrich Adler and the Englishman Tom Shaw joining as members of the group's Secretariat. London was chosen as the seat of the executive committee.

### Development

The LSI functioned as a continuation of the Second International, and was often referred to as the "Second International" by the Comintern.
The Social Democratic Party of Germany was the dominant party within the LSI.

### Response to Nazism

The rise of Nazism in Germany increased pressure on the LSI and Comintern to cooperate. On 19 February 1933, the LSI Bureau issued a call for joint action of the SPD and the Communist Party of Germany against Adolf Hitler's regime. The Comintern responded by stating that they were not convinced of the sincerity of the declaration. However, the Comintern did soon call its national sections to form united fronts together with social democratic parties locally. The LSI, on its side, did not accept the notion of local social democrats forming united fronts with the Communist parties. However, as the Comintern adopted a more conciliatory tone, the resistance of the LSI against forming such united fronts on the national level softened.
Within the LSI, a north–south cleavage emerged, as the Mediterranean LSI parties built fronts with the Communists whilst the British and Scandinavian parties rejected the notion of cooperation with the communists. With the German party in disarray, the British and Scandinavians became more influential within the LSI. Thus the space for socialist-Communist cooperation decreased. On 25 September 1934, the Comintern Executive issued a call for 'peace negotiations' between the two internationals, but the LSI rejected the offer.
After the outbreak of the Spanish Civil War, the LSI and the International Federation of Trade Unions launched an 'Aid for Spain' campaign. The LSI/IFTU relief efforts were channelled through the Spanish Socialist Workers' Party (PSOE) and Unión General de Trabajadores (UGT).

### Colonial question

Although the communists opposed colonialism, the LSI were generally supportive of colonialism. For example, the participation of the British Independent Labour Party in the communist-sponsored League against Imperialism caused a controversy within LSI, and the ILP was asked to break its ties with the League. However, the support of the LSI for colonialism was not complete. Regarding the Rif War, the second LSI congress, held in Marseille August 22–27, 1925, adopted a resolution calling for support of the independence of the Rif and urging the League of Nations to accept the Rif Republic as a member.

## Congresses

| Congress | Location | Date |
| 1st Congress | Hamburg, Germany | May 21–25, 1923 |
| 2nd Congress | Marseille, France | August 22–27, 1925 |
| 3rd Congress | Brussels, Belgium | August 5–11, 1928 |
| 4th Congress | Vienna, Austria | July 25-Aug. 1, 1931 |
| Conference | Paris, France | August 21–25, 1933 |

## List of members of the LSI

| Country | Party | LSI membership | LSI Executive representatives |
| Argentina | Socialist Party | 1924–1940 | Etchegoin (March 1925 – August 1927), Bernardo B. Delom (August 1928 – February 1934), Dino Rondani $^s$ (February 1934 – 1940) |
| Armenian Soviet Socialist Republic | Armenian Revolutionary Federation | 1923–1940 | Mikayel Varandian (May 1923 – March 1925, from 1924 shared seat with Kaplansky, July 1933 – April 1934), Archak Izakchjan (March 1925 – July 1933), Setrak Sassuni (April 1934 – December 1936), Vahan Champarzumian $^s$ (December 1936 – 1939), Hrant Samuelian [fr] (1939–1940) |
| Austria | Social Democratic Workers Party of Austria | 1923–1940 | Otto Bauer $^b$ (May 1923 – July 1938), Ferdinand Skaret [de] (May 1923 – October 1931), Robert Danneberg (October 1931 – December 1935), Karl Seitz (October 1931 – December 1935), Franz Korac (December 1935 – 1938), Joseph Buttinger (1939/1940, under the pseudonym 'Gustav Richter') |
| Austria | Czechoslovak Social Democratic Workers Party in the Republic of Austria | 1923–1940 | Alois Wawrousek (August 1925 – 1937) |
| Belgium | Belgian Labour Party | 1923–1940 | Louis de Brouckère (May 1923 – May 1939, $^b$ August 1935-), Emile Vandervelde $^b$ (May 1923 – June 1925, November 1927 – March 1935, February 1937 – December 1938), Joseph Van Roosbroeck [nl] (June 1927 – 1940, became the treasurer of LSI in November 1927), Camille Huysmans (August 1931 – 1940), Désiré Bouchery [nl] (March 1935 – June 1936), Arthur Wauters [fr] (August 1935 – February 1937), Jean Delvigne (June 1936 – 1937, $^b$ September 1936-), Max Buset [fr] (1937–1940), Achille Delattre (1938–1940) |
| British Guiana | British Guiana Labour Union | 1924–1940 | |
| Kingdom of Bulgaria | Bulgarian Social Democratic Workers Party (Broad Socialists) | 1923–1940 | Yanko Sakazov (May 1923 – 1940, until August 1925 seat shared with Živko Topalović) |
| Republic of China | Social Democratic Party of China | 1920s | |
| Czechoslovakia | Czechoslovak Social Democratic Workers Party | 1923–1938 | Antonín Němec [cs] (May 1924 – August 1925), František Soukup [cs] (August 1925 – September 1938, $^b$ 1932-), Lev Winter [de] (August 1931 – August 1935), Josef Stivín [cs] (August 1935 – September 1938), Gustav Winter [cs] (1937–1938) |
| Czechoslovakia | German Social Democratic Workers Party in the Czechoslovak Republic | 1923–1938 | Ludwig Czech (May 1923 – February 1930), Siegfried Taub (February 1930 – 1938), Wenzel Jaksch (1939–1940) |
| Czechoslovakia | Hungarian-German Social Democratic Party | 1923–1926 | |
| Czechoslovakia | Polish Socialist Workers Party | 1923–1938 | Chobot (1931–, shared seat with Johann Kowoll) |
| Czechoslovakia | Social Democratic Workers' Party in Subcarpathian Rus' | 1923–1930 | |
| Czechoslovakia | Socialist Association | 1923–1925 | |
| Denmark | Social Democratic Federation | 1923–1940 | Thorvald Stauning (May 1923 – April 1924, January 1927 – May 1929), Carl Madsen (May 1923 – October 1928), Alsing Andersen (April 1924 – January 1927, May 1929 – November 1935), Vilhelm Nygaard [da] (October 1928 – December 1936), Hans Hedtoft (November 1935 – 1940, $^b$ May 1936-), Eiler Jensen [da] (February 1938 – 1940) |
| Estonia | Estonian Socialist Workers Party | 1923–1940 | August Rei (February 1931 – November 1932, December 1933 – 1937) |
| Finland | Social Democratic Party | 1923–1940 | Karl Wiik (May 1923 – 1938), Jaakko William Keto [sv] $^b$ (1939–1940) |
| France | French Section of the Workers' International | 1923–1940 | Alexandre Marie Desrousseaux [fr] $^b$ (May 1923 – May 1936), Jean Longuet (May 1923 – 1939), Pierre Renaudel (August 1925 – June 1929, July 1930 – November 1933), Léon Blum (June 1929 – July 1930, May 1934 – May 1936, $^b$ June 1939 – 1940), Jean-Baptiste Séverac [fr] (November 1936 – 1940), Jean Zyromski (-November 1936), Marceau Pivert (1938), Salomon Grumbach [fr] (1939–1940) |
| Free City of Danzig | Social Democratic Party of the Free City of Danzig | 1923–1936 | Arthur Brill (January 1929 – 1936, July 1931- seat shared with Johann Kowoll) |
| Germany | Social Democratic Party of Germany | 1923–1940 | Arthur Crispien (May 1923 – May 1926), Hermann Müller (May 1923 – June 1928, February 1931 – March 1931), Otto Wels $^b$ (May 1923-Summer of 1938), Johannes Stelling (June 1928 – February 1931, Summer of 1938), Hans Vogel (1931–1938), Rudolf Hilferding (May 1936 – 1937, 1939/1940), |
| Georgian Soviet Socialist Republic | Social Democratic Labour Party of Georgia | 1923–1940 | Irakli Tsereteli (May 1923 – July 1929), Constantin Gvardjaladze [ka] (July 1929 – 1940) |
| United Kingdom | Labour Party | 1923–1940 | Arthur Henderson ($^b$ May 1923 – January 1924, February 1925 – July 1929, $^b$ August 1925-), James Ramsay MacDonald (May 1923 – January 1924), James Henry Thomas (May 1923 – January 1924), Harry Gosling (May 1923 – January 1924, Treasurer of LSI), Alexander Gordon Cameron (January 1924 – February 1925), Cramp (January 1924 – October 1925, $^b$ July 1925 -), William Gillies [de] (July 1929 – 1940, $^b$ May 1930-), Joseph Compton (October 1929 – January 1937), George Dallas (October 1936 – 1940), Hugh Dalton (October 1936 – 1940), Arthur Jenkins (January 1937-late c. 1937) |
| United Kingdom | Independent Labour Party | 1923–1933 | Wallhead (February 1924 – August 1925, Treasurer of LSI), Clifford Allen (January 1924 – November 1927), Fenner Brockway (November 1927 – November 1932) |
| Second Hellenic Republic | Socialist Party of Greece | 1923–1931, 1933 | |
| Kingdom of Hungary | Hungarian Social Democratic Party | 1923–1940 | Peidl (February 1924 – October 1928), Ernő Garami (May 1930 – March 1931), Emanuel Buchinger [hu] (March 1931 – 1940) |
| Kingdom of Hungary | Világosság Socialist Emigrant Group | 1923–1940 | Vilmos Böhm (August 1931 – 1940) |
| Kingdom of Iceland | Social Democratic Party | 1926–1940 | |
| Italy | United Socialist Party of Italian Workers | 1922–1930 | Giuseppe Emanuele Modigliani [it] $^b$ (May 1923 – 1938), Claudio Treves (May 1923 – July 1930, August 1931 – June 1933), Pietro Nenni (July 1930 – 1940), Franco Clerici [it] (June 1933 – March 1934) |
| Italy | Italian Socialist Party | 1930–1940 | Giuseppe Emanuele Modigliani [it] $^b$ (May 1923 – 1938), Claudio Treves (May 1923 – July 1930, August 1931 – June 1933), Pietro Nenni (July 1930 – 1940), Franco Clerici [it] (June 1933 – March 1934) |
| Latvia | Latvian Social Democratic Workers Party | 1923–1940 | Fēlikss Cielēns (May 1923 – April 1924, February 1928 – April 1932, 1938–1940), Brūno Kalniņš (April 1924 – February 1928), Fricis Menders (April 1932 – 1938) |
| Lithuania | Lithuanian Social Democratic Party | 1923–1940 | Steponas Kairys (November 1931 – November 1934) |
| Luxembourg | Workers Party of Luxembourg | 1923–1940 | Jean Fohrman (February 1936 – 1939), Alphonse Hummer (1939–1940) |
| Netherlands | Social Democratic Workers Party | 1923–1940 | Pieter Jelles Troelstra $^b$ (May 1923 – May 1925), Willem Vliegen $^b$ (May 1925 – 1930), Floor Wibaut [nl] (August 1925 – April 1935), Willem Albarda $^b$ (April 1930 – August 1939), Koos Vorrink (April 1935 – 1940) |
| Norway | Social Democratic Labour Party of Norway | 1923–1927 | Magnus Nilssen (May 1923 – January 1927) |
| Norway | Norwegian Labour Party | 1938–1940 | Martin Tranmæl (1939/1940), Einar Gerhardsen (1939–1940) |
| British Mandate for Palestine | Poalei Zion | 1923–1930 | Shlomo Kaplansky (shared seat with Mikayel Varandian May 1923 – June 1924, 1925–1940) |
| British Mandate for Palestine | Mapai | 1930–1940 | Shlomo Kaplansky (shared seat with Mikayel Varandian May 1923 – June 1924, 1925–1940) |
| Poland | Polish Socialist Party | 1923–1940 | Herman Diamand (May 1923 – February 1931), Mieczysław Niedziałkowski (August 1925 – 1940), Herman Lieberman (1931–1940, $^b$1932-) |
| Poland | German Socialist Labour Party of Poland | 1923–1940 | Johann Kowoll (January 1929 – June 1936, 1929 – July 1931 seat shared with Brill, July 1931- seat shared with Chobot), Emil Zerbe [pl] (June 1936 – 1940) |
| Poland | Independent Socialist Workers Party | 1923–1933 | Bolesław Drobner (May 1923 – June 1928), Joseph Kruk (June 1928 – October), both shared their seat with Topalović |
| Poland | General Jewish Labour Bund in Poland | 1930–1940 | Henryk Erlich (December 1930 – 1940) |
| Poland | Ukrainian Socialist-Radical Party | 1931–1940 | Matthew Stachiw (August 1931 – 1940) |
| Portugal | Portuguese Socialist Party | 1925–1933 | |
| Kingdom of Romania | Romanian Social Democratic Party | 1923–1940 | Șerban Voinea [no] (May 1923 – December 1923), Iacob Pistiner (May 1923 – August 1930), Gheorghe Grigorovici (January 1931 – May 1933), Ilie Moscovici (May 1933 – 1940) |
| Russian SFSR | Russian Social Democratic Labour Party (Mensheviks) | 1923–1940 | Raphael Abramovitch $^b$ (May 1923 – 1940) |
| Russian SFSR | Socialist Revolutionary Party | 1923–1940 | V. V. Sukhomlin [ru] (May 1923 – May 1930), Viktor Chernov (May 1923 – 1940) |
| Spanish Republic | Spanish Socialist Workers' Party | 1923–1940 | Julián Besteiro (May 1924 – October 1932), Largo Caballero (October 1932 – November 1932, September 1933 – September 1936), Remigio Cabello (November 1932 – September 1933), Fernando de los Ríos (September 1933 – 1937), Manuel Cordero Pérez [gl] (September 1933 – 1938) |
| Sweden | Social Democratic Labour Party of Sweden | 1923–1940 | Hjalmar Branting $^b$ (May 1923 – October 1924), Gustav Möller (May 1923 – October 1924, $^b$ July 1929 – September 1932), Arthur Engberg (October 1924 – July 1926), Rickard Lindström [sv] (October 1924 – July 1926, $^b$ September 1932 – 1940), Per-Albin Hansson (July 1926 – September 1932), Zeth Höglund (September 1932 – 1940) |
| Switzerland | Social Democratic Party of Switzerland | 1927–1940 | Robert Grimm (January 1927 – 1940, $^b$ August 1935-) |
| Turkey | Independent Socialist Party | | |
| Ukrainian Soviet Socialist Republic | Ukrainian Social Democratic Labour Party | 1923–1940 | Yosyp Bezpalko (June 1924 – February 1929), Opanas Fedenko (February 1929 – 1938) |
| Uruguay | Socialist Party of Uruguay | 1932–1940 | |
| United States | Socialist Party of America | 1923–1940 | Victor L. Berger (May 1923 – August 1929), Morris Hillquit (May 1923 – October 1933), Norman Thomas (December 1932 – 1940), James Oneal (November 1933 – October 1935), Devere Allen (October 1935 – 1936) |
| Kingdom of Yugoslavia | Socialist Party of Yugoslavia | 1923–1929, 1934–1940 | Živko Topalović (May 1923 – January 1929, until August 1925 seat shared with Sakazov, August 1925 – June 1928 seat shared with Drobner, June 1928- seat shared with Kruk) |
$^b$ = Bureau member
Other executive members: International Women's Commission: Adelheid Popp (February 1924 – September 1935), Alice Pels (September 1935 – 1940) Socialist Youth International: Karl Heinz (February 1924 – October 1932), Erich Ollenhauer (October 1932 – 1940)