Keith Johnstone's involvement with the theatre began when George Devine and Tony Richardson, artistic directors of the Royal Court Theatre, commissioned a play from him. This was the year of Look Back in Anger in 1956. A few years later he was himself Associate Artistic Director, in particular helping to run the writers' group. The techniques and exercises evolved there to foster spontaneity and narrative skills were developed further in the actors' studio, then in demonstrations to schools and colleges and ultimately in the founding of a company of performers called The Theatre Machine. Divided into four sections, "Status", "Spontaneity", "Narrative Skills" and "Masks and Trance", arranged more or less in the order a group might approach them, the book sets out the specific techniques and exercises which Johnstone has himself found most useful and most stimulating. The result is a fascinating exploration of the nature of spontaneous creativity." If teachers were honoured in the British theatre along-side directors, designers and playwrights, Keith Johnstone would be as familiar a name as are those of Jocelyn Herbert, Edward Bond and other young talents who were drawn to the great lodestone of the Royal Court Theatre in the late 1950s.
As head of the script department, Johnstone played a crucial part in the development of the 'writers' theatre '" (Irving Wardle)