Not a naive fool. A strategist

In the 1980s, political scientist Robert Axelrod ran a tournament of computer strategies in the prisoner’s dilemma, a model where you have to decide: cooperate or cheat. A simple strategy won, Tit for Tat (“you to me, I to you”), and it became a classic not only of game theory but of a sensible human life:

1. start with trust,

2. answer in the way the other person behaves,

3. be ready to cooperate again if the person has changed.

Why did this one win?

Because life is not one round. It is a series of relationships. Over the long run, the winners are not the most cunning. They are the ones who can create trust and keep it. Repeated experiments in game theory have confirmed this many times (V. V. Voevodin, Game Theory, Moscow State University).

How is this strategy connected to happiness?

When we choose trust as the start, we get:

✅ more warm, supportive ties,

✅ access to help, to opportunities, to love,

✅ a footing, and psychological resilience.

And the 80-year Harvard Study of Adult Development came to a simple conclusion: the quality of close relationships is the main factor in well-being. Trust is their foundation.

Why distrust wears you out

Distrust feels like protection, but it puts the organism into threat mode. This is not philosophy. It is physiology: anxiety rises, cortisol rises, attention is spent on control rather than on development (S. A. Belyaev, Anxiety and the Brain).

Trusting ties, by contrast, raise oxytocin, a hormone that lowers stress and strengthens relationships (a review in the journal Voprosy Psikhologii, no. 5, 2020).

In other words, distrust drains you. Trust fills you.

Tit for Tat is not “an eye for an eye”

The point is not revenge.

The point is a soft start, clear boundaries, and a possible return.

The strategy is easy to understand. It is harder to follow it after the first betrayal.

So you do not slide into cynicism and “I trust no one”:

1. Do not generalize.

It was not “the world” that let you down. It was a specific person. The conclusion is about them, not about people as a whole.

2. Let the emotion out safely.

Briefly write down what happened and what you feel. That lowers the inner tension (A. R. Luria, Language and Consciousness).

3. A response without revenge is distance.

You do not need to “teach the person a lesson”. It is enough to stop cooperating.

4. The chance to return is not an obligation.

If the person has understood and changed, you can return to a neutral contact.

If not, you let it go, calmly.

5. Do not be ashamed that you trusted.

You were not naive. You chose a strategy that raises the chance of a good relationship.

You simply got data.

Do not take revenge. Do not generalize. Do not close up.

Keep playing the long game. Just not with everyone.