You’ve probably noticed it. A CMO arrives with energy and ideas. They spend the first six months learning the business, rallying the team, sketching out a strategy. Then, somewhere between month nine and eighteen, something shifts. The meetings get harder. The CEO wants one thing; the board wants another; the product team is building something different. By month twenty-four, they’re gone.
Your board chalks it up to “fit” or “career move.” You write a respectful LinkedIn post. Then you start the search for the next one.
This isn’t a CMO problem. It’s a clarity problem.
And it’s costing you more than you think—especially in an economy where AI is reshaping every business, and coherence is the only real moat left.
The real cost of incoherence
Here’s what’s actually happening when leaders leave.
They arrive believing the CEO’s strategy. They start building proof: a campaign that reflects the mission, a positioning that differentiates, a go-to-market that sticks to the promise. They start to build momentum.
Then they hit the wall.
The CFO has different priorities. The product roadmap doesn’t align with the brand promise. Sales is chasing deals that contradict the positioning. The board is asking for different metrics than the strategy suggests. The CEO says one thing in all-hands and something else in the executive committee.
A good leader doesn’t quit because of politics. They quit because they’ve realised something: the organisation doesn’t actually believe what it says it believes. And they can’t build sustainable value on a foundation of contradiction.
So they leave.
What gets left behind is damaged momentum, a paused strategy, and the message to everyone else that alignment doesn’t matter, or at least, not as much as the pressure pulling the organisation in different directions.
In the AI-driven economy, coherence is survival
Most boards measure leadership turnover as HR risk. That’s looking in the wrong place.
The real cost is strategic incoherence, and in 2026, that cost is accelerating.
When AI is reshaping every function, when your competitors are moving faster, when customer expectations are shifting monthly, the organisations that survive are the ones that move as one. Not because they have a perfect strategy, but because everyone knows what they’re actually trying to do. When a hard decision comes, they make it fast. When a crisis hits, they respond together. When an opportunity emerges, they see it.
The organisations that lack coherence? They’re still debating what they stand for while the market moves past them.
Incoherence slows everything. It drains your best people. It confuses your customers. It makes you vulnerable to faster, more coherent competitors.
What coherence actually looks like
There are organisations where this doesn’t happen.
When the CEO commits to a strategy, people believe it. Not because the strategy is perfect, but because every subsequent decision reinforces it. The board measures success against it. The incentive structures reward it. The hiring and promotion criteria reflect it. The product roadmap is built around it. When someone asks a hard question, the answer traces back to it.
Those organisations have clarity.
And they have something else: they keep their leaders. They move faster. They make harder decisions with less debate. They attract talent who see their work as meaningful. They build brands and products that competitors can’t easily copy.
In an economy where AI is commoditising capability, clarity is the only real moat. It’s the thing that separates organisations that know what they stand for from organisations that are just reacting.
What this means for your board and CEO
If you’re losing leaders (CMOs, CFOs, Chief Product Officers), the turnover is just the symptom. The real question is: does your organisation have genuine coherence across strategy, culture, and execution?
Not strategy clarity; most organisations have that. I’m talking about the deeper thing: the consistency between what you say you stand for and what you’re actually rewarded for, structured for, and measured for.
When there’s a gap between those two things, good leaders leave. And they’re right to.
The organisations that have solved this don’t view brand and culture as HR or marketing functions. They view them as executive disciplines. The board oversees them. The CEO owns them. Every major decision gets traced back to them.
That’s not a burden. That’s competitive advantage.
In the next part of this series, I’ll walk through how to diagnose whether your organisation actually has coherence, and what clarity drift costs you when you don’t.
Download part I
Ready to explore this further?
Download the full presentation: the slides we use with boards and leadership teams to diagnose clarity gaps and make the case for coherence.
You’ll get:
The framework for understanding organisational coherence;
How to spot clarity drift in your own organisation;
Why CMO (and other leadership) churn is a clarity problem, not a hiring problem;
A starting point for board-level conversations about sustainable advantage.