You Can Teach Excel. You Cannot Teach Someone Not to Be a Jerk.

You can teach Excel. You cannot teach someone not to be a jerk.This sounds obvious when stated directly. The hiring and management practices of most organizations suggest that it is not, in practice, believed. Organizations consistently hire for skills and credentials — which are real and matter — while treating character as either assumed, secondary, or something that can be coached into place once someone is on the payroll. The result is teams full of capable people who are difficult to work with in ways that erode everything the capability is supposed to produce.The Coaching MythologyThe idea that character problems can be resolved through coaching and feedback is one of the most expensive myths in organizational management.Some things can be coached. A person who doesn't know how to give effective feedback can learn. A person who tends to overexplain can develop better concision. A person who struggles with difficult conversations can build that skill with practice and support. These are behavioral skills. They are learnable. The coaching is real and the investment often pays off.What cannot be coached is the underlying orientation toward other people that drives the most damaging team behaviors. The person who takes credit for others' work is not doing so because they lack a skill that can be developed. They are doing so because they are oriented toward self-advancement in a way that treats other people's contributions as instrumental. That orientation is not a skill gap. It is a character pattern, and it is durable.The organization that hires someone with a character problem and then invests in coaching has made two errors: the hiring error, and the error of believing the coaching will fix it. The coaching will produce, at best, a more sophisticated version of the same character operating with better concealment.The Skills Are Real — They're Just Not the ConstraintThe high-skilled person with character problems is genuinely skilled. This is what makes the situation confusing. Their output is real. Their expertise is real. Their contribution in their specific functional domain is real.What they cannot do — and what the skills cannot compensate for — is exist in a collaborative environment without degrading it. The team context in which most modern work happens is not separable from the individual output that happens within it. A technically excellent engineer who makes the codebase a battlefield is not producing technical excellence. They are producing technical output embedded in a cultural cost that will be paid by everyone who works with that code and that person.The skills are not the unit of analysis. The person-in-context is the unit of analysis. And person-in-context includes how they behave with others, what happens to a team's output when they are part of it, and what happens to a team's retention when they are part of it.What Teachable Actually MeansThe honest version of 'you can teach skills' is narrower than it is usually deployed. You can teach skills to people who are oriented toward developing them — who receive feedback openly, who are motivated by the team's success rather than primarily by their own advancement, who can tolerate being wrong without converting it into a status contest.These are character prerequisites. They are not themselves teachable in the same sense that Excel is teachable. Someone either brings this orientation or they don't. And someone who doesn't bring it will not benefit from skill training in any way that produces better team outcomes, because the skills will be put in service of the same underlying character.What the Data ShowsResearch by Will Felps at the Rotterdam School of Management found that a single 'bad apple' on a team — defined as someone who consistently undermines, withholds effort, or is interpersonally difficult — can reduce overall team performance by 30-40%. This is not a marginal effect. It is a structural one. The bad actor's presence suppresses what everyone else produces, even when those individuals remain personally capable.What Felps also found was that the mechanism was primarily behavioral contagion: teams adapted to the bad actor's behavior in ways that degraded their own conduct. The dynamics of self-protection, reduced trust, and defensive communication that the bad actor generated became the team's operating mode. Removing the bad actor reversed these dynamics, often quickly.This data reframes the question. It is not 'can we afford to address this character problem?' It is 'can we afford not to, given that the presence of this person is actively suppressing the output of everyone else?'The Hiring ImplicationThe practical implication is a shift in what hiring is actually for. Skills screening tells you whether someone can do the technical work. It tells you nothing about whether they will be safe to work with, whether they will contribute to or suppress team output, whether the people around them will thrive or will learn to protect themselves.Character screening — done seriously, through structured reference calls that ask specific behavioral questions, through interview processes that create real pressure and observe how candidates respond to it, through deliberate attention to how candidates treat support staff and junior interviewers — can tell you things skills screening cannot.The organizations that do this well consistently report the same outcome: they hire more slowly and fire less often. The people who make it through a genuine character screen are people whose skills and character reinforce each other rather than one compensating for the other's absence. The character conversation happens either at the front of the employment relationship or throughout it, usually at significant cost. The organizations that choose the front are not being idealistic. They are being practical.The Formation That AccumulatesFormation does not happen in the dramatic moments. It happens in the accumulation of small choices made in ordinary circumstances — the decision to hold a standard when no one is watching, to say the true thing when the comfortable thing is available, to show up fully when partial presence would have passed unnoticed.A man who makes these choices consistently over years does not experience a single moment of becoming someone different. He simply finds, at some point, that the choices have become easier — not because the standards have lowered but because his capacity to meet them has grown. The formation is the accumulation. There is no shortcut through it and no substitute for it.This is what the tradition means when it prescribes regulated practice: not the guarantee of immediate transformation but the reliable compound interest of right action sustained over time. The man who has practiced the right thing, in the right spirit, for long enough becomes a man for whom the right thing is more natural than the alternative.

The Practice That Doesn't End

The work described in this post is not completed by reading it. It is completed by doing it — by bringing the specific discipline outlined here to specific situations in specific days, and by continuing to bring it even when the situation no longer feels urgent enough to demand it.

This is the nature of character work: it does not stay where you put it. The discipline established in a season of intentional effort will fade if it is not maintained. The clarity achieved through sustained self-examination will cloud if the examination is discontinued. The relationships rebuilt through consistent honesty will drift if the honesty becomes intermittent.

What sustains formation is not memory of what was learned but the continuing practice of what was learned. The man who remembers having done this work and considers the work complete has confused the experience of doing it with the capacity the doing builds. The capacity is built by continuing, not by having continued. This is the practice. It does not end.