Historical Historical Orthodox Trotskyism is a branch of Trotskyism which aims to adhere more closely to the philosophy, methods and positions of Leon Trotsky and the early Fourth International, Vladimir Lenin and Karl Marx than other avowed Trotskyists.
[3] The orthodox Trotskyists suffered another split in 1973 between the Socialist Labour League (SLL) of Gerry Healy and the Internationalist Communist Organisation (OCI) of Pierre Lambert.
The group's founder, James Robertson, and his supporters were expelled from the American Socialist Workers Party in 1964 for opposing the SWP's rapprochement with "Pabloism."
But unlike their former factional associates who would later found the Workers League (now the Socialist Equality Party), the Spartacists did not embrace Gerry Healy's ICFI, objecting to Healy's characterization of Castro's Cuba as "state capitalist" rather than a "deformed workers state."
Max Shachtman of the Workers Party was describing the Fourth International as orthodox Trotskyist by 1948.