Survival Bias

The Missing Bullet Holes: Why What You Don’t See Matters Most

There’s a famous photograph from World War II that doesn’t show soldiers, explosions, or battlefields. Instead, it depicts the silhouette of an aircraft covered in red dots—each one marking where a returning bomber was struck by enemy fire. At first glance, the message seems clear: reinforce the areas riddled with holes. But one man saw something no one else did—not in the dots, but in the spaces between them.

That man was Abraham Wald, a mathematician working with the U.S. Statistical Research Group during the war. While military engineers proposed armoring the parts of the plane showing the most damage, Wald offered a counterintuitive insight: “These are the planes that survived,” he said. The real danger wasn’t where the bullets hit the returning planes—it was where they didn’t. The planes hit in those untouched zones never made it home to be studied. As one account puts it, “Wald showed that actually, you should put the armour where the bullet holes aren’t” .

This moment gave birth to one of the most enduring lessons in critical thinking: survivorship bias—the tendency to focus only on what has “survived” a process while ignoring what has not, simply because the failures are invisible or unrecorded . The bullet holes were data, yes—but incomplete data. The silence of the missing planes held the truth.

Survivorship Bias Beyond the Battlefield

Though rooted in wartime strategy, survivorship bias permeates nearly every aspect of modern life. In business, we study companies like Apple, Amazon, or Tesla and extract “secrets” to their success—agile workflows, bold leadership, customer obsession—while overlooking the thousands of startups that employed identical tactics and vanished without a trace .

A classic example: “Steve Jobs, Bill Gates, and Mark Zuckerberg dropped out of college and became wildly successful — so I will,” ignores the countless others who dropped out and never achieved fame or fortune . We hear the success stories because they’re loud, visible, and marketable. The failures? They fade into obscurity, leaving no data trail for us to learn from .

Even in finance, mutual fund studies often analyze only funds that still exist, omitting those that underperformed and were shut down—a distortion that inflates perceived average returns . In health research, focusing only on patients who survived a disease can skew treatment recommendations, neglecting critical factors that led to earlier deaths .

How to See the Invisible

So how do we avoid falling into this cognitive trap? Awareness is the first step—but not enough. We must actively seek out the missing data.

One powerful method is to ask: “What’s not here?” For every success story that inspires you, look for similar efforts that failed . When analyzing a strategy, product, or life choice, consider the graveyard of attempts that never made headlines. As one expert advises, “Focus on the process, not just the outcome. Assess the quality of decisions based on the information available at the time, not just the result” .

Diversifying your sources of information also helps. Instead of reading only biographies of billionaires, explore post-mortems of failed ventures. In team meetings, invite dissenting voices and near-miss reports—not just victory laps . And when making high-stakes decisions, consciously check your assumptions: “Am I only seeing the survivors?” .

The Wisdom in the Silence

Abraham Wald didn’t just save planes—he gave us a lens to see the world more clearly. His legacy reminds us that truth often hides in absence, not presence; in silence, not noise.

In a world obsessed with highlights, metrics, and viral success, the most valuable insights may lie in what’s missing: the quiet failures, the unspoken risks, the paths not taken. As you navigate your own challenges—whether in business, relationships, or personal growth—remember to look beyond the red dots.

Because sometimes, the most important lessons aren’t where the damage is visible…
but where nothing returns to tell the tale.