An old book might give clues.
Quoting a synopsis on Wikipedia:
Here he discerns a vicious circle: it is people of a certain type who are recruited and promoted, so others either do not apply or languish in insignificant positions. Among characteristics of the British officer class in the period under examination are: a narrow social segment admitted, scorn of intellectual and artistic endeavour, subservience to tradition, and emphasis on virility.
This leads, in his view, to the prevalence of an authoritarian type, fawning to superiors and often harsh or uncaring to inferiors. Such a man, by this analysis, is afraid of women (so only half human) and afraid of failure. He therefore ignores people and facts which do not conform to his world view, learns little from experience, and clings to external rules, applying them even when the situation demands other approaches (for example Haig sacrificing hundreds of thousands of men he ordered to walk through mud into German machine gun fire). He may not be stupid, though some of the generals studied undoubtedly were, and he may be physically courageous, but his fatal lack is moral courage. Men like Townshend and Percival, caught in a trap by a more enterprising enemy, sat zombie-like until disaster overwhelmed them.