Like so many Americans, I recently found myself wading through a mountain of documents needed by my tax advisor to make sense of a stereotypically complex year. I was standing over the scanner, watching the white light pass over page after page of my family’s financial records, when a mundane thought suddenly reminded me of the collapse of the Bronze Age.

It’s not as dramatic as it sounds—it’s just that I’m the only one who knows how to access this seemingly endless trove of statements, forms, and deductions. And it reminded me of the ancient Greek script known as Linear B, which was used by early accountants to record shipping transactions around 3,000 years ago.

Many causes contributed to the collapse of the Bronze Age, but the abrupt disappearance of Linear B hastened the Mediterranean’s slide into civilizational darkness. Despite its critical importance to the trading economy of the day, its use was so specialized among administrative scribes and so centralized within palace ledgers that it couldn’t survive the collapse of those institutions. No one else knew how to use it.

All of which brings us to today. Recent data from the Alliance for Lifetime Income suggests that over the next five years, nearly 15 million Baby Boomers will retire. Across varying industries, this will represent a loss of between 9%-17% of the total workforce.

Leadership Training Is Not Enough

While the impending knowledge crisis may not be on par with the collapse of the Bronze Age, there are clear lessons to be learned. We’re about to face the largest transition of human capital in modern history, but our standard solution to this enormous handoff of leadership and institutional knowledge—generic “Leadership Development”—simply isn’t up to the task.

Most organizations have some form of leadership training. We put promising candidates through seminars, we give them books on “Extreme Ownership” or “Emotional Intelligence,” and we hope that some of it sticks.

The reality is that leadership training without a succession strategy is just leadership for leadership’s sake. It’s mostly theoretical, like the difference between looking at a map of the Mediterranean and standing on a beach in Mykonos.

To navigate the next five years successfully, we need to frame leadership development differently by grounding it in succession strategy. This means explicitly preparing a specific person to step into a specific role with specific skills.

True Succession Planning

If we want the next generation of leaders to be prepared for the nuances of executing their roles, we need to change how we approach their development. Here are some steps we can take toward the right kind of succession plan:

Audit the Retirement Risk. Take a hard look at your team’s demographics to see which key roles are filled by professionals within a five year retirement window. You need to develop a concrete plan to replace them, starting with identifying potential internal candidates now.

Understand your Bench Strength. High performance is not the same as high potential. Organizations often find themselves with a stable workforce, but a vulnerable future. It’s critical to identify which team members are best suited to technical mastery and which are best suited to management.

Move from General Skills to Role-Specific Scenarios. Instead of theoretical exercises, use the actual challenges your company has faced in past projects. Put your successors in the driver’s seat of a simulated crisis that actually happened to teach them how to lead through specific hurdles.

Incentivize Succession Stewards. Promote leaders based on their ability to develop their own replacements, not just how good they are at their current job. This creates a culture where preparing for the future becomes everyone’s responsibility.

Engage in Results-Based Mentoring. Move beyond standard mentoring by giving a successor a high-stakes project with a measurable ROI. Pair them with a veteran leader who is responsible for the outcome, ensuring the guidance is grounded in practical execution.

Building a Strong Bench

It’s tempting to think the Silver Tsunami is still miles offshore, but the data tells us the wave is already beginning to break. In manufacturing and skilled labor, 10-12% transitions are already creating knowledge deserts where execution-level expertise is disappearing. Linear B was technical knowledge of a similar kind—and it took thousands of years to recover it.

Crucially, succession planning should not simply be seen as a human resources function. It is a fundamental leadership obligation. If you manage a team of any size, your legacy as a leader will reach far beyond the wins you post—it will rest on the strength of the bench you built.

In a follow-up article, we’ll discuss the mechanics of running an effective succession plan—incorporating the steps introduced here into a cohesive framework any organization can apply. The business world is changing rapidly and in myriad ways. The organizations that emerge stronger will be those that prioritize nurturing future leaders, ensuring the intentional transfer of the institutional knowledge required to succeed.