A few members felt that it had not gone far enough, and, led by George Spiro (known as "Marlen", a portmanteau of Marx and Lenin), split in early 1938 to form the "Leninist League".
Spiro aimed to destroy Trotskyism, calling Leon Trotsky an agent of Joseph Stalin and claiming that even the Revolutionary Workers League was "an enemy of the international working class.
Its 1937 publication, In defense of Bolshevism; behind the betrayal in Spain, declared that it was "against the policy of 'correcting' Stalinist reaction, the counter-revolutionary social democracy, and also Lovestoneism and Trotskyism which are separated from Leninism by a narrow but very deep gulf!
Spiro began to focus his work on antisemitism among the left, and disagreement about its direction caused the group to dissolve itself in about 1950.
One person who was influenced by the Marlenites was a young Noam Chomsky, who was introduced to the group, partly as a result of the history professor Ellis Rivkin.