This book appears to be an attempt by the authors to address some larger historical and strategic questions about the problem of communist coups and revolutions. Unfortunately, it lacks the depth to do so. Indeed, Unhumans has the feel of a book that was written strictly for a social-media audience—heavy on slogans and bumper-sticker-level zingers, but lacking any weightier analysis that addresses the foundations beneath today’s ideological battles. Moreover, the book suffers from the sorts of broad generalizations that are common in social media. The book lumps together, for example, today’s social-democratic Left with the armed partisans of the Spanish Civil War, or the merciless Red Guard of the Bolsheviks. While it’s true that all these groups share certain characteristics common to the Left overall, the lack of precision is unhelpful, to say the least.