Deterrence Is (Still) a Lie We Tell Ourselves

There’s a comforting fiction at the heart of modern strategy: that we can control outcomes by signaling strength clearly enough, loudly enough, and credibly enough.

We call it deterrence.

It sounds clean. Rational. Mathematical. You raise the cost high enough, the other guy backs down. You make your intentions clear, the other side understands. You show resolve, they hesitate.

But if Robert Jervis teaches us anything, it’s this:

Deterrence doesn’t fail because we’re weak.
It fails because we’re human.

The Problem Isn’t Power—It’s Perception

My first exposure to Jervis’ work was during my time as a grad student at Yale University. To sum up what I see as Jervis’ key point about deterrence, it’s that at its core, deterrence is about what the other guy thinks, not what you actually are.

Not your capabilities.
Not your intentions.
Not your carefully crafted policy.

What matters is how all of that is perceived, and misperceived, on the other side.

Jervis hammers this point early: states don’t operate off objective reality. They operate off their interpretation of reality—and those interpretations are often wrong.

That’s not a minor flaw in the system.

That is the system.

You’re Not Being Seen the Way You Think You Are

Here’s the uncomfortable truth: no matter how clear you think you’re being, the other side is filtering your actions through their own fears, biases, and assumptions.

We assume:

• “Our intentions are obvious.”
• “Our red lines are clear.”
• “They know we’re serious.”

History says otherwise.

The British thought Roosevelt was the reckless one in 1907—not Japan.
The U.S. thought China wouldn’t intervene in Korea—China saw a direct threat.
Japan knew America would fight in WWII—but thought it would quit early.

Same actions. Completely different interpretations.

That gap is where deterrence dies.

You Might Be Threatening the Wrong Thing

Deterrence assumes something else that’s rarely true: that we understand what the other side actually values.

We don’t.

We threaten what we would fear.

But the other side might:

• Value ideology over survival
• Value regime power over civilian lives
• See destruction as acceptable—or even inevitable

Jervis points out the obvious, uncomfortable reality: what one side sees as punishment, the other might see as tolerable… or even beneficial.

That’s how you end up with enemies walking straight into consequences you thought would stop them.

Credibility Is a Guess—Not a Fact

We love talking about “credibility” like it’s something you can measure.

It’s not.

It’s a belief—formed imperfectly, inconsistently, and often irrationally.

And worse, we don’t even know how others build those beliefs.

Do they judge us by:

• Our past actions?
• Our current situation?
• Our political system?
• Our leadership?

The answer is: all of the above… or none of the above.

Even Jervis admits we don’t have solid answers.

Which means most of what passes for “credible deterrence strategy” is built on assumptions we can’t verify.

Sometimes the Enemy Isn’t Choosing—They’re Cornered

One of the most dangerous blind spots in deterrence is this: we assume the other side has options.

Sometimes they don’t.

Sometimes they believe:

• If they don’t act, they lose everything
• The status quo is already unacceptable
• War is the least bad option

Japan in 1941. China in 1950. Both saw inaction as collapse, not stability.

You can’t deter someone who thinks they’re already out of moves.

The Most Dangerous Enemy Might Be Ourselves

Here’s where it gets worse.

We don’t just misunderstand the enemy—we misunderstand ourselves.

Jervis calls it self-deterrence.

We convince ourselves the threat is overwhelming… even when it isn’t.
We hesitate. We pull back. We limit our own options.

The British in the 1930s imagined German bombing power far beyond reality, and it shaped their policy accordingly.

They deterred themselves more effectively than Hitler ever could.

Sound familiar?

Your Brain Is Working Against You

Even if you had perfect intelligence—which you don’t, and never will—you’d still have a problem: human cognition.

Jervis outlines a few pitfalls inherent in our psyche:

• Overconfidence: We think we understand more than we do
• Bias toward existing beliefs: We see what we expect to see
• Failure to see trade-offs: We convince ourselves our chosen policy has no downside
• Emotional avoidance: We ignore uncomfortable realities

All of this combines into one brutal truth:

We’re not nearly as rational as deterrence theory assumes we are.

You Can’t Fine-Tune Signals in a Noisy World

Strategists love nuance.

Send just enough force to signal seriousness—but not enough to provoke escalation.
Apply pressure—but not too much.
Communicate strength—without closing off diplomacy.

It sounds great on paper.

In reality, the other side:

• Misreads the signal
• Filters it through bias
• Or ignores it entirely

Jervis makes it clear: even simple messages get distorted. Complex ones don’t stand a chance.

So What Does This Mean?

It means deterrence isn’t a lever you pull.

It’s a gamble.

A gamble built on:

• Imperfect information
• Flawed human judgment
• Misaligned perceptions
• And a constant risk of getting it completely wrong

And here’s the part nobody likes to say out loud:

You can do everything “right”… and still fail.

The Real Lesson

The takeaway isn’t that deterrence is useless.

It’s that it’s fragile.

And pretending it’s precise—predictable—controllable?

That’s how you end up surprised when things go sideways.

Because in the end, deterrence doesn’t break because of bad math.

It breaks because we assume the other side sees the world the way we do.

They don’t. They never have, and they never will.

Jervis knew that.

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Charles is the owner of The Havok Journal. He served more than 27 years in the U.S. Army, including seven combat tours in Iraq and Afghanistan with various Special Operations Forces units, two assignments as an instructor at the United States Military Academy at West Point, and operational tours in Egypt, the Philippines, and the Republic of Korea. He holds a doctorate in business administration from Temple University and a master’s degree in international relations from Yale University. For The Havok Journal, he writes largely on leadership, military and veteran issues, and current affairs.

As the Voice of the Veteran Community, The Havok Journal seeks to publish a variety of perspectives on a number of sensitive subjects. Unless specifically noted otherwise, nothing we publish is an official point of view of The Havok Journal or any part of the U.S. government.