How To Make Better Decisions Through Disagreement


To make more effective decisions, develop disagreement rather than consensus.  Disagreement provides alternatives and makes you think more deeply about the issue. 

In fact, if you don’t have disagreement, you’re not ready to make a decision. 

In The Essential Drucker, Peter Drucker writes about encouraging disagreement rather than consensus to helps make more effective decisions.

Key Take Aways

Here are my key take aways:

  • Don’t make a decision unless there’s disagreement.   Find the concerns.  Before you make a decision, first find the concerns.
  • Disagreement provides alternatives.  Disagreement provides alternatives, stimulates the imagination, and helps you break out of preconceived notions.
  • Understand the alternatives.   Know the implications and impact of the alternatives.
  • Know why people disagree.  People might disagree for good reasons.  Find out why.
  • Know both sides of the issue.  Don’t just know one side of the story.  Take the time to know both sides.

Don’t Make a Decision Unless There’s Disagreement

Drucker writes that you should not make a decision unless you’ve considered alternatives:

“Unless one has considered alternatives, one has a closed mind.  This above all, explains why effective decision-makers deliberately disregard the second major command of the textbooks on decision-making and create dissension and disagreement, rather than consensus.  Decisions of the kind the executive has to make are not made well by acclamation.  They are made well only if based on the clash of conflicting views, the dialogue between different points of view, the choice between different judgments.  The first rule in decision-making is that one does not make a decision unless there is disagreement.”

The Right Decision Demands Adequate Disagreements

If you don’t have disagreement, then you’re not ready for a decision.  You don’t fully understand the problem.  Drucker writes:

“Alfred P. Sloan is reported to have said at a meeting of one of his top committees, “Gentlemen, I take it we are all in complete agreement on the decision here.” 

Everyone around the table nodded assent. 

“Then,”continued Mr. Sloan, “I propose we postpone further discussion of this matter until our next meeting to give ourselves time to develop disagreement and perhaps gain some understanding of what the decision is all about.” 

Sloan was anything but an “intuitive” decision-maker.  He always emphasized the need to test opinions against facts and the need to make absolutely sure that one did not start out with the conclusion and then look for the facts that would support it.  But he knew that the right decision demands adequate disagreements.”

3 Reasons for Insisting on Disagreement

Disagreement can help you avoid preconceived notions, find new alternatives, and stimulate the imagination. 

Drucker writes:

“There are three main reasons for the insistence on disagreement.  It is, first, the only safeguard against the decision-maker’s becoming the prisoner of the organization.  Everybody always wants something from the decision-maker. 

Everybody is a special pleader, trying – often in perfectly good faith – to obtain the decision he favors. 

This is true whether the decision-maker is the president of the United States or the most junior engineer working on a design modification.  The only way to break out of the prison of special pleading and preconceived notions is to make sure of argued, documented, thought-through disagreements.

Second, disagreement alone can provide alternatives to a decision.  And a decision without an alternative is a desperate gambler’s throw, no matter how carefully thought through it might be. 

There is always a high possibility that the decision will prove wrong – either because it was wrong to begin with or because a change in circumstances makes it wrong.  If one has thought through alternatives during the decision-making process, one has something to fall back on, something that has already been thought through, that has been studied. 

Without such an alternative, one is likely to flounder dismally when reality proves a decision to be inoperative.

Above all, disagreement is needed to stimulate the imagination.  One does not, to be sure, need imagination to find the right solution to a problem.  But then this is of value only in mathematics.  In all matters of true uncertainty such as the executive deals with, whether his sphere is political, economic, social, or military – one needs “creative” solutions that create a new situation. 

And this means that one needs imagination – a new and different way of perceiving and understanding.”

Commit to Find Out Why People Disagree

Don’t just disagree, find out why there’s disagreement.  Knowing why people disagree helps you cut through the fog.  Drucker writes:

“The effective decision-maker, therefore, organizes disagreement.  This protects him against being taken in by the plausible but false or incomplete. It gives him the alternatives so that he can choose and make a decision, but also so that he is not lost in the fog when his decision proves deficient or wrong in execution. 

And it forces the imagination – his own and that of his associates.  Disagreement converts the plausible into the right and the right into the good decision. 

The effective decision-maker does not start out with the assumption that one proposed course of action is right and that all others must be wrong.  Nor does he start out with the assumption, I am right and he is wrong. 

He starts out with the commitment to find out why people disagree.”

First Understand the Alternatives

Drucker writes that you need to understand the alternatives:

“Effective people know, of course, that there are fools around and that there are mischief-makers.  But they do no assume that the man who disagrees with what they themselves see as clear and obvious is, therefore, either a fool or a knave.  They know that unless prove otherwise, the dissenter has to be assumed to be reasonably intelligent and reasonably fair-minded. 

Therefore, it has to be assumed that he has reaches his so obviously wrong conclusion because he sees a different reality and is concerned with a different problem. 

The effective person, therefore, always asks, What does this fellow have to see if his position were, after all, tenable, rational, intelligent? 

The effective person is concerned first with understanding.  Only then does he even think about who is right and who is wrong.”

Lawyers Know Both Sides

Drucker writes that to make the most effective decisions, you need to understand both sides of the issue:

“In a good law office, the beginner, fresh out of law school, is first assigned to drafting the strongest possible case for the other lawyer’s client. 

This is not only the intelligent thing to do before one sits down to work out the case for one’s own client.  (One has to assume, after all, that the opposition’s lawyer knows his business, too.)  It is also the right training for a young lawyer. 

It trains him not to start with, “I know why my case is right,” but with thinking through what it is that the other side must know, see, or take as probable to believe that it has a case at all.  It tells him to see the two cases as alternatives. 

And only then is he likely to understand what his own case is all about.  Only then can he make out a strong case in court that his alternative is to be preferred over that of the other side.”

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  1. Hi J.D.

    I like this post. I never thought of the need for disagreement before, but after reading the quotes you included, it all makes sense. If fact it reminds me of how a blog’s comment section can bring up other viewpoints and engage others in a lively discussion.

  2. Hey Barbara

    It very much reminded me that the best decisions have been through a few boxing rounds.

    Here’s the catch though — if you don’t orchestrate the disagreement, you can have energy draining, stale-mating meetings. It’s like a real-time, tug of war where everybody is pulling in different directions at the same time (your facts and figure people, your happy go lucky people, your black hat critics … etc.)

    There’s a solution I now know that I wish I knew long ago. It’s having people cycle through “hats” as a team. Everybody cycles throug the different perspectives of the hats together. (Check out How To Use the Six Thinking Hats –

    I think it’s also important to encourage cooperative controversy. (Check out Cooperative Controversy Over Competitive Controversy –

    BTW, you do a good job on your blog of actively supporting “cooperative controversy” which is very effective for sharing a variety of perspectives.

    On a somewhat related note, I’m studying rhetoric now with the book Thank You for Arguing, where Jay Heinrichs teaches us the art of arguing without anger.

  3. I LOVE a good debate because it does make me THINK. I really admire bloggers that are willing to have a discussion, as opposed to bloggers that always look for agreement in their comment section.

  4. Vered — I would LOVE to debate with you right now, but unfortunately, I have to agree with you 😉

    I too am a fan of those that make me think.

  5. He calls it “develop disagreement”. I call it ” devil’s advocate”. I like wearing devil’s advocate hat – it develops disagreement and thus debates. The caveat though is that folks DO take me seriously and start attacking me [back?]- i explain it as an anti-pattern for building rapport. TO build rapport you should make the other party love you upfront. Wearing devil’s advocate hat does not really help building rapport. What I changed now is that I tell the other party “now I wearing devil’s advocate hat, let’s see what can go wrong in that case”. I think it helps

  6. Hi J.D.

    I noticed you haven’t posted for about a month now. Is life keeping you busy?

    I’m looking forward to your next post.

    Hope all is well in your world.

  7. Hey Barbara

    Thanks for checking! Yeah, life’s keeping me busy 😉

    I was hoping to get a break between finishing the last book and starting the next, but there’s been a whirlwind of changes at work. The new book is quite an adventure and I’m exploring and pathpaving again.

    I expect to be back blogging in August.

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