The Cream of the Crop is the first comprehensive account of the Royal Canadian Air Force's (RCAF) selection and training procedures and its policies governing aviators who were considered unsuited for operational duties, especially those judged to have a “lack of moral fibre” (LMF). Allan English assesses the effectiveness of RCAF use of manpower and questions whether the aircrew really were, as the RCAF alleged, the cream of the nation's crop.