Norway. But both these head organisations have always co-operated and mutually supported each other. The Labour Party has always a represent- ative on the central board of the National Feder- ation, and the latter has likewise always had its representative on the central board of the Labour Party. The International Socialistic Bureau (Second International) was founded in 1900, and the Norwegian Labour Party joined this organisation. It held membership in the Second International until 1919, when the party resolved to withdraw and to join the Communistic International in Moscow (Third International). As early as 1918 the Labour Party Congress resolved to recognise the «revolutionary mass action» as a means of seizing power in the State and not to respect the decision of a parliamentary majority should it be unfavourable to the working classes. This resulted in the resignation of the then party leaders. This question did not, however, give rise to a party split, nor was this the case in 1919 when the party joined the Moscow International. The cleavage did not occur until 1921, when the party resolved to accept the so-called «Moscow Theses», which aimed a direct blow at the social- democratic section of the party. The latter there- fore withdrew from the Labour Party and formed in 1921 the «Norwegian Social-Democratic Labour Party». There were now two labour parties in Norway: 159