It is now more than thirty years since the publication of the first edition of this work. It was written as a reply to Monty Johnstone, who was a leading theoretician of the Communist Party of Great Britain. Johnstone had published a reappraisal of Leon Trotsky in the Young Communist League's journal Cogito at the end of 1968. Alan Woods and Ted Grant used the opportunity to write a detailed reply explaining the real relationship between the ideas of Lenin and Trotsky. This was no academic exercise. It was written as an appeal to the ranks of the Communist Party and the Young Communist League to rediscover the truth about Trotsky and return to the original revolutionary programme of Lenin.