The National Left-Wing Movement (NLWM), set up by the Communist Party of Great Britain (CPGB) in 1925-26 to pull the Labour Party rank and file towards Communist politics, was one in which Marxists worked in a largely open fashion to promote specific programmatic principles.

This publication sheds new light on how the early CPGB approached its work inside the Labour Party and points to a more variegated picture of the CPGB in the mid-to-late 1920s as still capable of producing rational and principled responses to the class struggle - albeit, in the case of the NLWM, partially flawed and unsuccessful ones.

The NLWM had another goal forced upon it of protecting Communists and their sympathisers from a Labour leadership intent on expelling and disaffiliating such elements in a pursuit of respectability. This monograph seeks to qualitatively measure the impact of that disaffiliation process on the CPGB, the NLWM and Labour sympathisers.