He was also a Marxist and political theorist since 1938. I do not want to go into too much detail here, but some of the most prominent people in the movement were people like Paul Bewley, Ralph Miliband, and others. As one could probably surmise, Paul Bewley is the first to use the slogan The Left can be defeated by the Left. One of Bewley's greatest achievements was creating the People's Defence League. I will go through this in more detail for those who have little or no interest in anarchism. Many of the founders of the PL found this to be an obvious mistake because they did not believe in anarchism. But there were also many others who do believe in anarcho-capitalist capitalism based on class struggle rather than the common market. As far as I know there is no official position on that (they have never come up with a plan to abolish the so-called Trade Union system). They also think that the people must stand up for their basic rights as an individual person (at least if people can understand what a Basic Income means).