A certain kind of person will find this book - and the consultative services offered by the authors' company Root, Inc. which it promotes relentlessly - useful. That person is the caretaker CEO, elevated to a leadership role because of her/his skill at navigating office politics rather than because they have any business acumen, novel or visionary ideas or leadership abilities. Despite receiving stratospherically-high salaries to drive corporate strategy and performance, these CEOs are unable to effectively define and message a corporate mission, establish a strong corporate culture, or create conditions for high-performing teams. Fortunately for them, they can read about how to do these things in Blind Spots and then pay Root a fortune to help facilitate changes while they go back to consolidating their power, laying off people to pay for the costs of their own failures as leaders, and collecting outsized compensation for "making the tough calls" and "accountability" for corporate performance.
This type of person will likely be taken in by the historical examples of "blind spots" described by the authors that include the bloodletting treatment that caused George Washington's death, and a cigarette marketing campaign claiming that doctors recommended cigarettes. But my reaction was that none of these examples were "blind spots," which are areas outside one's field of vision that contain unseen information or risks. Bloodletting was not a "blind spot" because nobody knew what caused disease at that time. There wasn't a source available that Washington's doctors just failed to consult because they didn't know about it. There wasn't even technology available that would have allowed them to treat him better had they just looked. Nor was the cigarette marketing an example of a "blind spot." It was a deceptive marketing campaign that the cigarette company knew full well distorted what doctors said about cigarettes; not a failure to understand that cigarettes were unhealthy. The examples seem to be "things that were once commonly believed to be true, were claimed to be true or plausibly could have been true, but no longer are," not "blind spots."
That said, the actual principles in the book do seem to reflect "blind spots," albeit blind spots of CEOs who lack the talents and self-reflective abilities to identify and correct their own leadership deficiencies. The points made in Blind Spots relating to outdated leadership beliefs and poor corporate culture are reasonable enough, and the writing is competent. But even at 150 pages, it's a slog to read, as it's all a high-level discussion about "bad corporate culture" that is allegedly solved by Root using the principles in Blind Spots, producing dramatic turnarounds, without providing any specifics about what was changed or how this produced different results. It's "take our word for it, we turned around the whole company." What I learned is that if you have to retain a company like Root to address the issues raised in Blind Spots, you really shouldn't be in a leadership position.