When it was originally published in 1984, Militant was widely acclaimed as a masterly work of investigative journalism. Although the rise of Jeremy Corbyn is to be attributed to more than hard-left entrism, to some within the party, Crick's book must seem like a lesson from history.Militant was a secret Trotskyite organisation that consistently denied being a party, though at its peak in the mid-1980s it could boast around 8,000 members, all of whom also belonged to the Labour Party. Militant operated clandestinely inside the Labour Party, edging out moderates at grass-roots level and recruiting people to its own ranks.