Defy: The Power of No in a World That Demands Yes book review by Trevor Blondeel
(Speak Up Culture for Manufacturing Leaders)
| Dr. Sunita Sah, 2025
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What Defy Means for Speak Up Culture in Manufacturing
Open a dictionary and defy means to challenge, to resist boldly or openly. Sunita Sah gives the word a different definition, and her whole book turns on it. To act in accordance with your true values when there is pressure to do otherwise.
That definition covers the operator who sees the fixture is wrong and says so, the quality manager who holds a shipment while everyone else watches the clock (hard as a materials manager, I know), and the supervisor who stops the line. In our world, when the pressure to get results runs higher than the responsibility for safety, people get hurt, and when output matters more than the anchor of quality, bad parts end up at your customer. Sah has spent years studying why people go quiet in exactly those moments.
What’s It All About?
Sunita Sah practiced as a physician before becoming an organizational psychologist at Cornell, and both halves are visible in the book. She writes about compliance the way a doctor writes about a symptom, tracing it back to a cause.
We go along with what we know is wrong, in situations ranging from trivial to life threatening, because we have been conditioned to comply. She has a name for what keeps us quiet, and it comes out of her own research. Insinuation anxiety is the fear that pushing back implies the other person is biased, careless, or not competent, so we say nothing because saying something feels like an accusation.
Any plant leader has felt that one, usually with the veteran operator who has run the job his way for twenty years and would take a question about the method as a question about the man, which is why the question tends to go unasked.
The Big Idea
Sah refuses to make this a binary, and that is what makes the book useful. There is no completely defiant person and no completely compliant one. Defiance runs in stages that begin with tension, move through acknowledgment and escalation, then a threat of noncompliance, and only then the act itself. Tension is the signal your brain sends before you even know what you object to, and her advice is to quit ignoring it.
The concept that stayed with me is conscious compliance. Sometimes going along is the right call, not a grudging yes but a deliberate one, because it keeps you in position for a more effective stand later.
It also describes good manufacturing. We follow the standard, then we work to change the standard. The plant that gets this right does not have people quietly deviating on midnight shift, it has a written deviation process where each department signs off and the customer authorizes it, which is conscious defiance built into a system.
Favorite Quote
"What someone believes their values to be is quite different from how they actually behave."
That gap is the whole problem. Ask any leader what they stand for and you will hear integrity, safety, quality, respect, then watch the same leader on the last Thursday of the month with a shipment due. The gap is not hypocrisy, it is pressure, and pressure is what Sah studies.
I know that one from the inside. Years ago, a boss wanted me to park high-value product across the street at month end so it would stay off our inventory books until the next period, and we would walk it back over once the numbers closed. I knew it was wrong while he was still talking. It is part of why I eventually left. What stays with me is not the decision so much as how unreasonable the whole thing sounded in the room. I could feel it was wrong, knew it was against my own values, and I still did it.
Biggest Takeaway
I expected a book telling me to take a stand and hold my ground, and that is not what this is.
Her research on why nurses stay silent found two reasons: fear, and the belief that speaking up would change nothing anyway. The nurses thought the culture was the problem. Their managers thought the nurses were the problem. Sah calls the space between those two views the defiance empathy gap. What looks unsafe to you can sit inside a comfortable norm for someone with more power, and that person cannot understand why you would hesitate.
When someone complies because they do not feel safe to speak, the person in charge reads it as agreement, and silence gets recorded as a yes. Your crew agrees with you less often than you think.
Bonus Information
Challenger is the story closest to our industry. Alan McDonald and Roger Boisjoly raised the O-ring problem before the launch and were overruled, seven people died, and both men spoke publicly afterward and paid a professional price for doing it.
Most of us in manufacturing or other industries have watched a smaller version of that, where someone sees the problem, says it once, gets talked past, and goes quiet. Nothing catastrophic happens, so nothing gets learned either. And people stop bringing their ideas forward because the ideas do not get addressed.
The fix is not asking people to be braver. It is building a plant where the standard is clear, where the crew knows how to raise a flag, and where raising it counts as protecting the operation rather than slowing it down. Sah gives you the language for why that is so hard, which is the first step to changing it.
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You can find Defy: The Power of No in a World That Demands Yes on Amazon.
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Reviewed by: Trevor Blondeel, July 2026