Internal vs External Locus of Control: The Stoic Version

Your locus of control is where you believe the causes of your life sit. An internal locus attributes outcomes mainly to your own actions and choices; an external locus attributes them to luck, fate, or other people. It’s a spectrum, not a category — the psychologist Julian Rotter built it into a scale in 1966 — and where you sit on it quietly shapes how you act, because you don’t try to change what you’ve decided isn’t yours to change.

That much you can get from any psychology page. Here is the part they leave out: this is not a 1966 discovery. Epictetus drew exactly this line around 125 AD and made it the hinge of an entire philosophy — and his version fixes the mistake the modern one tends to produce, which is the belief that the goal is simply to become “more internal.”

What’s the difference between an internal and external locus of control?

Locus of control describes who or what you hold responsible for what happens to you. Someone with an internal locus reads outcomes as the result of their own effort, decisions, and character. Someone with an external locus reads the same outcomes as the work of luck, circumstance, fate, or powerful other people. Most people aren’t purely one or the other — you can be strongly internal about your career and strongly external about your relationships.

The reason it matters is behavioural, not just descriptive. If you believe an outcome is down to you, you act on it. If you believe it’s down to forces beyond you, you don’t — there’s nothing to act on. The belief becomes self-confirming.

What each one looks like

The quickest way to see your own locus is to listen to how you explain a setback.

• Internal: “I didn’t prepare enough.” “I handled that badly.” “I can do something about this next time.”
• External: “The interviewer had it in for me.” “I never get the luck.” “That’s just how things are for people like me.”

Neither is automatically right. Sometimes the interviewer really did have it in for you. The point isn’t which story flatters you — it’s which one is accurate, and the trouble is that most of us default to one style and apply it to everything.

Where the idea came from — Julian Rotter

The term is Julian Rotter’s. Working within social-learning theory, he proposed in the 1950s that people hold generalised expectations about whether their own behaviour controls what happens to them, and in 1966 he published the I-E Scale to measure it. Decades of research since have linked a more internal locus to better persistence, health behaviour, and academic outcomes — which is where the popular takeaway comes from: internal good, external bad, become more internal.

That takeaway is half right and quietly dangerous.

Is an internal locus actually better?

Mostly, yes — but pushed to its limit it becomes its own pathology, and this is the part the self-improvement version misses.

There is also the opposite failure the cheerful version ignores: sometimes an external attribution is simply correct. Poverty, discrimination, illness, and plain bad luck are real causes, and reading them as personal failings is not strength — it’s an error in the other direction. The skill was never “be more internal.” The skill is locating the line accurately: what here was actually mine, and what wasn’t?

Which is the exact problem a Roman ex-slave solved eighteen centuries before Rotter named it.

The older version — Epictetus and the dichotomy of control

Epictetus opens his Enchiridion — a handbook compiled around 125 AD — with one distinction and builds everything on it: some things are in our power, and some are not.

Within our power are opinion, aim, desire, aversion — whatever affairs are our own. Beyond our power are body, property, reputation, office.

Read that against Rotter and the overlap is almost embarrassing. “Whatever affairs are our own” is the internal locus. “Body, property, reputation” — outcomes decided partly by the world — is the external. Epictetus is describing the same line, with one difference: for him it isn’t a personality trait you happen to score high or low on. It’s a skill you practise — sorting each thing, as it arrives, into the right column, and investing your effort only in the column that’s actually yours.

To be clear, this is convergence, not borrowing. There’s no evidence Rotter was reading the Stoics; psychology arrived independently at a line the Stoics had already drawn. But the ancient version is the more precise of the two — and it contains the correction the modern one needs.

Can you change your locus of control — without the self-blame trap?

Yes, and Epictetus already mapped the route. He describes three stages, and they line up exactly onto the locus-of-control spectrum:

When we are impeded or disturbed or grieved, let us never blame others, but ourselves. It is the act of an ill-instructed man to blame others; of one who has begun to be instructed, to blame himself; and of one whose instruction is complete, neither to blame another, nor himself. — Enchiridion V

That is the whole shift in one sentence. Blame others is the external locus — nothing is yours, so nothing can be done. Blame yourself is the naive internal locus — everything is yours, so everything is your fault. Blame neither is the mature position: stop assigning fault altogether and ask only the practical question — is this in my power or not? If it is, act. If it isn’t, let it go. Marcus Aurelius compressed it to a test you can run in the moment: if it’s in your power, put it right; if it isn’t, what is the use of complaining?

So the move isn’t to crank yourself toward “more internal.” It’s to get accurate — to stop running one explanatory style over everything and instead sort each situation honestly, then spend your energy only where it can land.

One caution the Stoics are often accused of forgetting: “not in my control” is a tool for peace, not a license for passivity. That an outcome isn’t in your individual power doesn’t mean nothing can be done about it — some things that are outside your control are inside ours, collectively. The dichotomy is for putting down the weight of what you genuinely can’t move, not for looking away from what could be changed if enough people pushed.

That distinction — what’s mine, what’s ours, what’s nobody’s — is the same one Epictetus made the founding insight of his whole method, and it sits at the centre of the wider overlap between ancient philosophy and modern psychology. It’s also the thing whose absence, left to harden, becomes the flat resignation psychologists call learned helplessness — an external locus that has stopped looking for the column marked “mine” at all.

So: notice how you explain your next setback. Not to force the internal story — sometimes the external one is true — but to ask the older, sharper question underneath it. Was this mine? Then move. Was it not? Then it was never the thing to carry.