Who said you are the average of the five people you spend the most time with?

Jim Rohn (1930-2009), an American speaker and entrepreneur. It is a stage line: no published study establishes an averaging effect over exactly five people, and the number five has no experimental origin.

Is there science behind the five people rule?

Not in that form. Christakis and Fowler's work on the Framingham cohort describes behaviours spreading through a social network, which is a different claim, and it is contested: Cohen-Cole and Fletcher showed in 2008 that the same method makes height and headaches look contagious.

What remains true for a founder or CEO?

That the people around you decide what you get to see: the options they name and the objections they dare raise. That is information exposure rather than contagion, and it can be chosen deliberately.

Journal · What we can prove

"You are the average of the five people": is it true?

The phrase has circulated for forty years without a source. Here is what can be established, what is disputed, and what a leader can do with it.

What we can prove · 6 min read

Where does the line come from? Jim Rohn (1930-2009), an American speaker. It is not the summary of a study: no published work establishes an averaging effect over exactly five people, and the number five has no experimental origin.

What the line is not

There is no experiment behind "the five people". Not the number, not the idea that your traits average out, not the promise that swapping five contacts would change your level. It is a stage line, effective because it is simple, quoted for forty years without anyone asking for the source.

The research that comes closest, and what it actually says

The nearest serious work is Christakis and Fowler on the Framingham cohort, describing the spread through a social network of obesity (2007), smoking cessation (2008) and self-reported wellbeing (2008), with a reach they put at three degrees of separation. That is already a different claim: it concerns behaviours propagating in a network, not an average taken over five people.

And that research is contested

The methodological critique is serious and worth stating. Cohen-Cole and Fletcher showed in 2008 that the same method yields absurd results: acne, headaches and even height appear contagious. Shalizi and Thomas then established that with observational data of this kind, contagion generally cannot be separated from homophily, the plain fact that similar people associate. Lyons pressed a harder critique of the network analysis itself.

Resembling each other and influencing each other produce the same curves. That is the whole problem.

What survives, and it is enough

You cannot claim that you become the average of five people. You can claim something smaller and more useful: the people around you decide what you get to see. The options someone names, the objections someone dares raise, the comparisons that become your reference points, all of it comes from specific people. That is not mysterious contagion, it is information exposure, and it can be chosen.

For someone running a company the consequence is sharp. The people around you mostly depend on you: teams, suppliers, advisers you pay. None of them has an interest in contradicting you for long. The problem is not that you drift toward their average, it is that nobody brings you the objection you did not have.

Better questions than the line

Who contradicted me this month? If the answer is nobody, that is not evidence you were right.
Where did my options come from? If they all come from one place, the range is narrower than it looks.
Who has nothing to lose by telling me no? It is the only question that really sorts an inner circle.

Five Peers editorial note. Sources named in the text: Christakis and Fowler (2007, 2008); Cohen-Cole and Fletcher (2008); Shalizi and Thomas (2011); Lyons (2011). The Jim Rohn line has no scientific source.

Five ways of reasoning that are not yours, convened on one decision.

Compose my board