The peacock doesn't send its CV

Nature does not ask for self-declarations: it looks for signals that are hard to fake. A reflection on how to evaluate talent with evidence.

The peacock doesn't send its CV

Series: What nature already knew about talent · 1/6 · Talent assessment

There is a question that has been bothering biologists for over a century: why does the peacock have a tail?

It’s absurd. It weighs, hinders flight, exposes the animal to any predator, and it takes an enormous amount of energy to keep it in condition. If evolution rewards what helps survival, the peacock's tail should have disappeared long ago. Darwin wrote that seeing it made him nauseous because it didn’t fit into his theory.

The answer came in the seventies, from the Israeli zoologist Amotz Zahavi, and it is one of the most elegant ideas in biology: the tail exists precisely because it is costly.

The signal that cannot be faked

Zahavi called it the handicap principle. A mediocre male cannot afford such a tail. If he has it and is still alive, if he has dodged foxes while dragging that banner and has found enough food to keep it shiny, then the tail says something true about him that cannot be faked.

The female does not trust what the male claims. There is no way a peacock can convince anyone that he is healthy and well-fed. He has to prove it with something that only someone who truly is can display. The signal is reliable because it is costly, and it is costly because it is impossible to fake.

Notice the detail: nature did not invent a system for males to describe themselves. It invented a system so that the description is unnecessary.

We did the opposite

In organizations, we built exactly the opposite system.

We ask people to describe themselves. The CV is a self-declaration. The interview, for the most part, is too. The skills map that is filled out on the intranet once a year is a self-declaration with checkboxes. And performance evaluations measure what the person did in a specific context with a specific boss, which is not the same as what they know how to do.

On that basis, we make the most expensive decisions that exist in a company: whom we hire, whom we promote, in whom we invest training, to whom we give the new equipment.

And it’s not that people lie. It’s that no one really knows what they know. Psychology has been documenting for decades how poorly we self-evaluate: those who know the least tend to overestimate themselves, and those who know the most tend to underestimate themselves because they are aware of everything they lack. An honest self-declaration is still an imprecise self-declaration.

When in a meeting it is decided that "Marta is ready to lead the area" or that "Jorge lacks technical level," what lies beneath is almost always a mix of the direct boss's perception, project history, and what the person has said about themselves. It’s the best intuition in the room. And the best intuition in the room is wrong enough that a failed hire costs, according to the most cited estimates, about one and a half times the annual salary of the position.

The question of the peahen

What the female does is ask herself one question: is there anything here that this male could not show if it were not true?

Translated to talent, that question is: what evidence do I have that this person can do this, that does not depend on them or their boss telling me?

Most of the time, the honest answer is "none." We have history, we have opinion, we have self-perception. We do not have measurement.

Measuring is something else. Measuring is putting the person in front of the specific skill that the position requires and seeing what happens, with a method that gives the same result if repeated and that does not depend on who is watching. It’s what we do with anything important, from an MRI to an audit. With people, curiously, it’s what we do the least.

I’m not saying that the CV, the interview, or the manager's criteria are unnecessary. I’m saying they are the description, and the description only serves when there is something underneath to contrast it. The peacock's tail does not replace the peacock: it makes it readable.

What changes when you measure

When an organization starts to assess capabilities instead of just collecting them, three things happen almost immediately.

The first is that surprises appear in both directions. People who were not on anyone's radar and who master things that the company is paying for outside. And people with the correct title on the record whose real level is far below what the position requires.

The second is that difficult conversations become possible. Telling someone that they are not ready for a position is uncomfortable when it’s your opinion, and it’s a development conversation when it’s a fact that you can both look at together.

The third is that every decision becomes defensible. Before management, before a committee, before the person themselves, and increasingly, before a regulator who will ask what criteria were used.

At The Wise Skill, we have been building this for years: a way to know what people, candidates, and employees can really do, through evaluation and not self-perception, so that decisions about hiring, promoting, or developing can be made based on evidence. But this article is not about us. It’s about a question you can ask yourself in the next talent meeting tomorrow.

Is there anything in this decision that we might not be seeing if it weren't true?

If the answer is no, you are still reading the CV. And the peacock doesn’t send its CV.

If you want to see it with your own profiles, message me directly and I’ll tell you how we do it.

Next delivery: the weaver bird, or why the female doesn’t interview the male, she inspects the nest.