# International Socialist Bureau

The International Socialist Bureau (French: Bureau Socialiste International) was the permanent organization of the Second International, established at the Paris congress of 1900. Before this there was no organizational infrastructure to the "Second International" beyond a series of periodical congresses, which weren't even given a uniform name. The host party of the next congress was charged with organizing it.
After the International Socialist Congress of Paris of 1900, a permanent Bureau was established which met periodically in between congresses. A permanent secretariat was also established in Brussels. There were in all 16 plenary meetings of the Bureau.
The membership of the bureau was fluid from meeting to meeting, each country sending one to three representatives at a time. Many illustrious figures of the socialist movement, and several future heads of state or government were members at one time or another.
All this information is taken from La Deuxième Internationale, 1889-1914: étude critique des sources, essai bibliographique by Georges Haupt

## Plenary meetings
### 1st. Brussels; December 30, 1901

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | USA | Arg. |
| Victor Serwy | Edward Anseele; Emile Vandervelde | Édouard Vaillant; Alfred Léon Gérault-Richard | Henry Hyndman; Harry Quelch | Karl Kautsky; Paul Singer | Cesarine Wojnarowska | B. N. Krichevsky; Georgi Plekhanov | Hendrick Van Kol; Pieter Jelles Troelstra | George D. Herron | Achille Cambier |

### 2nd. Brussels; December 29, 1902

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | Arg. | Austria |
| Victor Serwy | Edward Anseele; Emile Vandervelde | Jean Jaurès; Bracke | Henry Hyndman; Sam Woods | Paul Singer | Cesarine Wojnarowska; B.A. Jedrychovski | B. N. Krichevsky; B. A. Guinzburg | Hendrick Van Kol; Pieter Jelles Troelstra | Alfred Léon Gérault-Richard | Victor Adler |

### 3rd. Brussels; July 20, 1903

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | USA | Arg. | Den. |
| Victor Serwy | Edward Anseele; Emile Vandervelde | Édouard Vaillant | Henry Hyndman; Hunter Watts | Wilhelm Pfankuch; Richard Fischer | Cesarine Wojnarowska | B. A. Guinzburg | Hendrick Van Kol; Pieter Jelles Troelstra | Gaylord Wiltshire | Patroni | Peter Christian Knudsen |

### 4th. Brussels; February 7, 1904

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | Arg. | Austria |
| Victor Serwy | Edward Anseele; Emile Vandervelde | Édouard Vaillant; Bracke; Amilcare Cipriani | Henry Hyndman; Harry Quelch | Karl Kautsky; Paul Singer | Rosa Luxemburg; Henryk Walecki | Georgi Plekhanov | Hendrick Van Kol; Pieter Jelles Troelstra | Achille Cambier | Victor Adler |

### 5th Amsterdam; August 15, 1904

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | USA | Arg. | Austria | Den. | Italy | Nor. | Boh. | Jp. |
| Victor Serwy | Edward Anseele; Emile Vandervelde | Édouard Vaillant; Bracke; Amilcare Cipriani | Henry Hyndman; Ernest Belfort Bax | Karl Kautsky | Rosa Luxemburg; Walecki | Georgi Plekhanov | Hendrick Van Kol; Pieter Jelles Troelstra | Morris Hillquit | Achille Cambier; Manuel Ugarte | Engelbert Perner-storfer | P. Knudsen | Enrico Ferri | Olav Kringen | Franc Soukup; Anton Nemec | Sen Katayama |

### 6th. Brussels; January 15, 1905

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Arg. | Austria | Lux. |
| Victor Serwy | Edward Anseele; Emile Vandervelde | Édouard Vaillant; Bracke; Amilcare Cipriani; Jean Longuet | Henry Hyndman | Karl Kautsky; August Bebel | Rosa Luxemburg | Pavel Axelrod; Roubanovitch | Achille Cambier | Victor Adler | Michel Welter |

### 7th. Brussels; March 4–5, 1906

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Arg. | Lux. | Boh. | Swiss | Hung. | Fin. |
| Camille Huysmans | Edward Anseele; Emile Vandervelde | Édouard Vaillant; Jean Jaurès | Henry Hyndman; J. Keir Hardie | Karl Kautsky; August Bebel | Jozef Kwiatek | Roubanovitch | Manuel Ugarte | Michel Welter | Franc Soukup; Anton Nemec | Jean Sigg | Mano Buchinger | Yrjo Sirola |
Consultative members: Garske of the Workers party of Latvia and Lew of the Socialist Party of Armenia

### 8th. Brussels; November 10, 1906

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. SRs | Rus. RSDRP | Boh. | Sweden | Hungary |
| Camille Huysmans | Edward Anseele | Édouard Vaillant | Henry Hyndman; J. Keir Hardie | Paul Singer; August Bebel | Hermann Diamand | Roubanovitch | Georgi Plekhanov; Angelica Balabanov | Franc Soukup; Anton Nemec | Hjalmar Branting | Jacob Weltner; Max Grossmann |
Consultative members Stanislas Kurski; Leo Bergman of the General Jewish Labour Bund; O. Braun of the Latvian Social Democrats

### 9th. Brussels; June 9, 1907

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. SRs | Rus. RSDRP | Boh. | Ne. | Lux. | Austria | Den. |
| Camille Huysmans | Edward Anseele; Emile Vandervelde | Édouard Vaillant; Jean Jaurès; Jean Longuet | Henry Hyndman; Bruce Glasier | Paul Singer; August Bebel | Hermann Diamand | Roubanovitch | Martov; Angelica Balabanov | Franc Soukup; Anton Nemec | Hendrick Van Kol; Pieter Jelles Troelstra | Michel Welter | Victor Adler | C. M. Olsen |
Consultative members Stanislas Kurski; Leo Bergman of the General Jewish Labour Bund; O. Braun of the Latvian Social Democrats

### 10th. Brussels; October 10, 1908

| Sec. | Bel. | Fr. | Br. | Ger. | Austria | Pol. | Rus. SRs | Rus. RSDRP | Rus. "SERP" | Rus. "URP" | Boh. | Ne. | Sweden | Italy | Den. | Hung. | Bulg. | Arm. | Lat. | Bund. |
| Camille Huysmans | Edward Anseele; Leon Furnemont; Louis de Brouckere | Édouard Vaillant; Angele Roussel; Jean Longuet | Henry Hyndman; Bruce Glasier | Hermann Molkenbuhr | Victor Adler | Hermann Diamand; Karl Kautsky | Roubanovitch | Lenin | Chaim Zhitlowsky | Pereverzev | Franc Soukup; Anton Nemec | Hendrick Van Kol | Hjalmar Branting | Garatti | Thorvald Stauning | Mano Buchinger | Avramoff | Varandian | K. Sutte | B. Nelin; G. Borski |

### 11th. Brussels; November 7, 1909

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Boh. | Ne. | Lux. | Austria | Den. | Hu. | USA | Arg. | Swed. | Bulg. | Sp. |
| Camille Huysmans | Edward Anseele; Emile Vandervelde | Édouard Vaillant; Jules Guesde; Jean Longuet | Keir Hardie; Harry Quelch; G. H. Roberts | Paul Singer; Hermann Molkenbuhr | Hermann Diamand; Adolf Warski; Wronsky | Roubanovitch; Lenin; C. Sutte | Franc Soukup; Anton Nemec | Hendrick Van Kol; Pieter Jelles Troelstra | Michel Welter | Victor Adler | P. Knudsen; Thorvald Stauning | Ernő Garami | Victor Berger; Kretlow | Achille Cambier | Hjalmar Branting | Breitko Loukov | Fabra Ribas |

### 12th. Copenhagen; August 26–31, September 2–3, 1910

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Boh. | Ne. | Austria | Den. | Hu. | USA | Swed. | Bulg. | Rom. | Serb. | Turk. | Fin. | Nor. |
| Camille Huysmans | Edward Anseele; Emile Vandervelde; Leon Furnemont | Édouard Vaillant; Guesde; Jean Jaurès; Angele Roussel | Ramsay MacDonald | Friedrich Ebert; Hermann Molkenbuhr | Hermann Diamand; Karl Kautsky | Roubanovitch; Lenin; T. Medem | Franc Soukup; Anton Nemec | Hendrick Van Kol; Pieter Jelles Troelstra | Victor Adler; Engelbert Perner-storfer; Engelbert; Ferdinand Skaret | P. Knudsen; Thorvald Stauning | Mano Buchinger | Daniel De Leon; Morris Hillquit; Victor Berger | Hjalmar Branting; CGT Wickman | Yanko Sakazov; Georgi Kirkov | Racovsky | Tucovic | Varandian | Yrjo Sirola; Vaino Tanner | Einar Li; Magnus Nilssen |

### 13th. Zurich; September 23–24, 1911

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | Swiss. | Austria | Serb. | Italy | Hung. | Boh. | Turk. |
| Camille Huysmans | Edward Anseele; Emile Vandervelde; Leon Furnemont | Édouard Vaillant; Angele Roussel; Jean Longuet | Harry Quelch | Hermann Molkenbuhr; August Bebel | Rosa Luxemburg; Hermann Diamand | Georgi Plekhanov; Lenin | Pieter Jelles Troelstra | Sgragen; Karl Moor; Bruestein | Victor Adler | Tucovic | Pompeo Ciotti | Mano Buchinger | Franc Soukup; Anton Nemec | Saul Nahum |

### 14th. Brussels; October 28–29, 1912

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | Swiss. | Austria | Rom. | Italy | Hung. | Boh. | Turk. | Swiss. | Sw. | Den. |
| Camille Huysmans | Edward Anseele; Emile Vandervelde; Leon Furnemont | Édouard Vaillant; Angele Roussel; Jean Longuet | Harry Quelch; Bruce Glasier; F. W. Goldstone | Hermann Molkenbuhr; Karl Kautsky; Hugo Haase | Rosa Luxemburg; Hermann Diamand | Georgi Plekhanov; Roubanovitch; Merkel | Pieter Jelles Troelstra | Sgragen; Karl Moor; Bruestein | Victor Adler | Racovsky | G. Agnini; Angelica Balabanov | E. Garami; J. Weltner | Franc Soukup; B Kolar | Saul Nahum | Fritz Stunder | Branting | Carl Madsen; Thorvald Stauning |

### 15th. London; December 13–14, 1913

| Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | Swiss. | Austria | Rom. | Italy | Hung. | Boh. | USA | Sw. | Den. | Nor. | Arg. |
| Edward Anseele; Emile Vandervelde; Camille Huysmans; Louis Bertrand | Édouard Vaillant; Jean Jaurès; Jean Longuet | "a large delegation from the British...parties" | Hermann Molkenbuhr; Karl Kautsky; Friedrich Ebert | Rosa Luxemburg; Hermann Diamand; Lapinski | Tcheidze; Roubanovitch; Litvinov | Vliegen | Fritz Stunder | Victor Adler | Racovsky | G. Agnini; Angelica Balabanov | Mano Buchinger | Franc Soukup; B Kolar | Kate Richards O'Hare | Branting | Thorvald Stauning | Jacob Vidnes | Ramon Saint-Marie |

### 16th. Brussels; July 29–30, 1914

| Sec. | Bel. | Fr. | Br. | Ger. | Pol. | Rus. | Ne. | Swiss. | Austria | Rom. | Italy | Hung. | Boh. | Sw. | Den. | Arg. |
| Camille Huysmans | Edward Anseele; Emile Vandervelde; Louis Bertrand | Édouard Vaillant; Jean Jaurès; Jean Longuet; Jules Guesde; Marcel Sembat | Keir Hardie; Bruce Glasier; Dan Irving | Hugo Haase; Karl Kautsky; Rosa Luxemburg | Walecki | Pavel Axelrod; Roubanovitch; Winter; O. Braun | Troelstra | R. Grimm; Karl Moor | Victor Adler; Friedrich Adler | Racovsky | Angelica Balabanov; Oddino Morgari | Mano Buchinger | Bohumil Nemec | Branting | Thorvald Stauning | Fabras; Corales |

## First World War

In autumn 1914, shortly after the occupation of most of Belgium by German troops, the executive committee decided to move the headquarters from Brussels to the Hague, with the approval of the Belgian Labor Party. The all Belgian Executive Committee also unanimously decided to expand itself by adding three Dutch members, Troelstra, Van Kol and Albarda, with Vleigen and Wibaut as alternates. Camille Huysmans, a Belgian, remained Secretary. This arrangement was approved by all of the affiliated parties, except the French party which decline to vote, believing that the International should have stayed "where it was and what it was".
In the early months of the war the Executive Committee resisted efforts to call a full meeting of the Bureau, feeling that it would have been impossible to get delegates from certain countries together and feeling that an unrepresentative meeting might mean the dissolution of the International altogether. In January and February 1915 the BSI attempted to hold a series of separate, one-on-one meetings with representatives of the parties in belligerent nations. The French refused to send a delegation to the Hague. The British were at first willing, but opted out after Arthur Henderson became a member of the War Cabinet. The Belgians were the first to send a delegation, and the German party met with the executive twice.
The BSI was pointedly hostile to the Zimmerwald Conference. At a speech to the congress of the Dutch party Huysmans ridiculed the Zimmerwaldians for their impatience, as well as for the unrepresentative and "amateur" nature of the conference. Huysmans later reportedly made special trips to Britain and France to dissuade socialists in those countries from attending the Kienthal Conference. Partly in response to Zimmerwald and Kienthal, though, the Bureau arranged for a meeting of socialists from the neutral countries. Originally scheduled for June 23, 1916 this conference finally met at the Hague on July 30-August 2, 1916. Consisting of nine delegates from Argentina, the United States (Algernon Lee), the Netherlands, Denmark and Sweden, the conference passed a resolution expressing confidence in the Executive Committee and deprecating any effort to break up the official International
In April 1917, after the March Revolution in Russia, Stauning of Denmark wrote to the BSI stating that if they were unable to summon a general conference of Socialist parties, it would be organized without them. Upon getting this appeal the Dutch members of the Executive Committee left for Stockholm. Huysmans soon joined them setting up the secretariat of the Bureau at the Trade Union House of the Swedish Socialist Party. On May 2 Huysmans and Engberg became the Secretariats representative in a new organization, the Dutch-Scandinavian Committee which attempted to convene a general socialist conference at Stockholm for the remainder of 1917, without success.
In November 1918 Huysmans worked in concert with the committee appoint by the fourth Inter-Allied Socialist Conference for the convening of a socialist conference of the formerly belligerent nations. The final result of this was the Berne Conference of 1919.