https://www.nationalreview.com/2020/01/book-review-leadership-in-war-lessons-from-nine-figures-who-made-history/
A reassuring conclusion of Leadership in War is that we don’t — and that, in fact, morally repugnant individuals are inherently less successful war leaders. Roberts’s chapter on Hitler is a tour de force of historical portraiture. Forget the clichés about his bewitching charisma, Hitler was an absurd, boorish, banal, vainglorious, misogynistic “little weirdo,” incapable of normal human interactions, uncomfortable in anything approaching debate or discussion, hooked on juvenile conspiracy theories of all kinds, and whose ideas would not have stood up to 30 minutes of serious television interview. Both his and Stalin’s chronic insecurity, personal cruelty, and cynicism born of their guiding concepts of race and class wars, caused them to make errors and miscalculations at critical decision points in the war. They were all but incapable of taking on others’ ideas; or of operating within an alliance, habitually inclined, as they were to view their partners’ behavior not as goodwill to be reciprocated but as weakness to be exploited.