Threshold Concentration: Why Culture Change Must Go Deep and Narrow

By Joe Newsum

You have built great commitments, whether core, operating, or activity commitments. The place almost everyone fails is not in creating them. It is in driving that shared language consistently through the organization until people live it. That is the work of making culture change stick, and at the very foundation of it sits one discipline that matters more than any other: Threshold Concentration. It is the focus discipline that makes everything else possible, and it is the single most important and least understood idea in culture change.

Threshold Concentration is the foundation of the larger framework for making culture change stick. That framework drives people to see the commitments and use them, and reinforces them from every direction, until people own them, all through a set of reinforcing levers. But none of those levers work if they are spread thin across the whole organization. Concentration is what gives them somewhere deep enough to take hold. This page is the deep dive on that discipline, and the science behind why it works.

Let me explain why this is the hard part, and why concentration is the answer. A high performing culture is the deliberate elevation of how people think and act together. The key words are think and act together. Culture is people behaving in a similar, aligned way, and getting a few people, then a dozen, then hundreds, then thousands to do that is staggeringly hard. To change how people behave you first have to change how they think, and every one of those people arrives with their own thousands of years of inherited learning, experience, education, and ingrained ways of thinking. You are not writing on a blank page. You are trying to drive coherence out of genuine mental chaos.

The only tool that can do that is shared language, which is exactly what your commitments are. Language shapes thinking, and shared language is the one thing that can get many minds pointed the same way. But here is the catch, and it is everything: creating the language is the easy part. Getting hundreds or thousands of busy, different people to actually use it consistently, day after day, until it becomes how they truly think, that is the mountain. And you do not climb it by spreading yourself across the whole organization at once.

Broad and Shallow Fails. Deep and Narrow Wins.

Most culture change fails for one reason: it goes broad and shallow. A dozen initiatives, a long list of behaviors, posters, a town hall, everything launched everywhere at once. The energy is spread so thin that no single piece of language gets the repetition it needs to take hold, and each push is absorbed back into people’s old ways of thinking before the next arrives. That is the mechanics behind the failure rate above. (I cover the full picture on why culture change fails.)

Threshold Concentration is the mirror image. Instead of broad and shallow, you go deep and narrow. You concentrate all the energy on one domain, one area where culture visibly lives, and you drive the shared language there relentlessly until people genuinely use it, it crosses the threshold, and it holds on its own. Then, and only then, you move to the next domain. Narrow enough to reach real depth, deep enough to actually stick.

The Mechanism: The Threshold Cascade

To understand why concentration works and scattering fails, you have to understand how behavior actually spreads through a group. The answer comes from decades of research on collective behavior, and it is the key to everything.

The foundational idea is the threshold. Sociologist Mark Granovetter, building on Thomas Schelling’s work on critical mass, showed that every person carries a threshold: the number of other people who need to be doing something before they will do it too. A few early adopters have low thresholds and will move first. The large middle majority will not move until they see many others already doing it. And the most resistant will not change until almost everyone else already has. Behavior spreads only when enough people cross their thresholds in sequence, each shift triggering the next.

This is exactly why scattered culture change fails and concentrated change works. When you push a little change across many areas, you only ever activate the handful of people already inclined to change. Their shift is too small to trigger anyone else’s threshold, and the behavior dies. But when you concentrate enough change in one area at once, language, leadership modeling, and tools all pushing the same behavior, you activate not just the early adopters but the next tier, and the next. Enough people cross their thresholds that the behavior reaches a tipping point. Past that point, it cascades: the new way becomes the path of least resistance, and the culture begins to carry itself.

Fragile Versus Self-Sustaining

This gives us the real goal of culture change, and the clearest way to tell whether yours is working. Most culture change, even when it shows early signs of life, stays fragile. It depends entirely on sustained leadership attention. The leaders push, behaviors shift a little, and the moment that attention moves to the next priority, the culture springs back to where it was. The change never became real; it was being held up by force.

A self-sustaining culture is the opposite. Once a behavior crosses the threshold in a domain, it holds on its own. People do it not because they are being watched, but because it is simply how things are done here, and the social pressure now runs in favor of the new way rather than against it. The culture protects itself. That is the entire aim: not behavior that survives as long as you keep pushing, but behavior that no longer needs you to push at all.

Think of a change your organization tried to make. Did it hold on its own, or did it fade the moment leadership stopped paying attention? That difference is the difference between fragile and self-sustaining.

Crossing the Threshold

If crossing the threshold is the goal, concentration is how you get there. You pick one domain, one area or activity where culture visibly lives, and you concentrate everything on it until the shared language is genuinely used and the new behavior becomes self-sustaining. Then, and only then, you move to the next domain. The picture below shows why this works when spreading the effort does not.

Concentration feels wrong to most leaders, because the instinct under pressure is always to do more, faster, everywhere. But that instinct is exactly what guarantees failure. Doing one thing deeply enough to cross the threshold beats doing ten things too shallowly to change anything. Concentration is not a compromise. It is the only thing that works.

How to Run It: One Domain at a Time

Making culture change stick, in practice, is a disciplined sequence. You concentrate, you reach the threshold, you move on, and the domains compound.

The Same Mechanism Works at Every Level

One of the most powerful things about this approach is that the mechanism is identical whether you are transforming an entire enterprise or just your own team. Concentration and the threshold cascade work at any scope. In practice, that shows up as two paths, which can run independently or together.

The independence is the point. Whether you lead a company of fifty thousand or a team of five, you do not change a culture by spreading yourself across all of it. You concentrate on one domain, cross the threshold, and let it compound.

The Hard Part Is the Discipline

None of this is complicated to understand. It is hard to do, and the difficulty is almost entirely about discipline. The discipline to concentrate when every instinct says to do more, everywhere. The discipline to stay on one domain until it is genuinely self-sustaining, rather than declaring victory at the launch and moving on. The discipline to sustain focused leadership attention long enough for the threshold to be crossed. This is the part most organizations get wrong, and it is where the real work of making culture change stick actually lives.

Get the discipline right, and culture change stops being the thing that fails. It becomes the thing that compounds, domain by domain, into a culture that holds on its own.

Concentration is the antidote. The diagnosis deserves its own page. Read next: Why Culture Change Fails, the full picture of what goes wrong and why.