Think Again

The verdict

Think Again is Adam Grant’s best book — tighter than Give and Take, more original than Originals, and more relevant to the current moment than either. The central argument is that in a world of accelerating change, the ability to unlearn and rethink is more valuable than the ability to learn and think. Intelligence is not enough. Expertise is not enough. What matters is the willingness and ability to update what you know when the evidence changes.

Grant writes with the clarity and energy that have made him the most popular organizational psychologist of his generation. The research is solid, the examples are engaging, and the practical implications are clear. If the book has a weakness, it is that Grant makes everything feel slightly too tidy — the real world of rethinking is messier and more psychologically painful than the book sometimes acknowledges. But as a framework for developing intellectual humility, it is excellent.

The four mental modes

Grant opens with a framework that sticks: most people, when dealing with contested ideas, default to one of three mindsets. Preachers deliver sermons to protect their sacred beliefs. Prosecutors marshal evidence to prove the other side wrong. Politicians seek approval by telling audiences what they want to hear. All three modes have the same fundamental problem: they are organized around defending or selling a position, not around discovering truth.

The alternative is the scientist mode: forming hypotheses, testing them against evidence, and revising them based on results. Scientists (in the idealized sense Grant uses the term) are not attached to their conclusions. They are attached to the process of reaching better conclusions. When an experiment disproves a hypothesis, a good scientist does not experience failure — they experience progress.

Grant is not naive about how rarely actual scientists operate this way. He acknowledges that working scientists are as prone to confirmation bias and motivated reasoning as anyone else. The point is not that scientists are paragons of rationality but that the scientific mindset — hypothesis, test, revise — is the optimal approach to uncertain beliefs.

Confident humility

The book’s most nuanced concept is confident humility: the combination of high confidence in your ability to figure things out with genuine openness about whether your current approach is right. This is different from both arrogant certainty (I know I’m right) and imposter syndrome (I don’t know anything).

Confident humility says: I trust my ability to learn and adapt, but I hold my current beliefs provisionally. I am confident in the process, not in any particular conclusion. This distinction matters because many people resist intellectual humility out of fear that it means losing confidence. Grant shows that the most effective leaders, scientists, and decision-makers combine fierce determination with genuine openness to being wrong.

The art of persuasion through questions

The section on changing other people’s minds is the most practically useful. Grant draws on motivational interviewing — a therapeutic technique originally developed for addiction treatment — to show that the most effective way to help someone reconsider a position is not to argue against it but to ask questions that help them explore their own uncertainty.

When you present evidence against someone’s position, they dig in. When you ask them to rate their confidence on a scale of one to ten and then ask “why didn’t you pick a lower number?”, you invite them to articulate the space between their belief and certainty. This space is where rethinking happens.

Grant also emphasizes acknowledging common ground and complexity. When you present an issue as having two sides, people pick one and defend it. When you present the same issue as having multiple dimensions and genuine trade-offs, people become more nuanced in their thinking and more open to updating their views.

The challenge of identity

Grant returns to the theme that runs through all the best books on reasoning: the fusion of beliefs with identity is the primary obstacle to rethinking. When your political views, your career choices, your dietary practices, or your parenting philosophy become part of who you are rather than positions you hold, updating them feels like losing yourself.

The solution Grant proposes is to build your identity around values and processes rather than opinions and conclusions. “I am someone who values evidence and follows it wherever it leads” is a more adaptive identity than “I am someone who believes X about Y.” The first identity is compatible with changing your mind. The second makes changing your mind feel like an identity crisis.

Read this if…

You are in a leadership role where changing minds — your own or others’ — is part of the job. Think Again is also valuable if you notice yourself becoming more rigid in your thinking as you accumulate expertise and want a framework for remaining intellectually flexible. It pairs well with Julia Galef’s The Scout Mindset, which covers similar territory from a slightly different angle.

Skip this if…

You have already read deeply in the rethinking/rationality space (Galef, Tetlock, Kahneman). Grant’s contribution is synthesis and accessibility rather than novel research, and if you have already absorbed the source material, the book may feel like a well-written review rather than new territory.

Start here

Read Chapters 1-3 for the four mental modes and the confident humility framework. Then jump to Chapter 7 on motivational interviewing and Chapter 8 on charged conversations. These chapters contain the ideas you will use most frequently.