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There Really Is No Collective Brain

One of the key principles of Ayn Rand’s philosophy is that reason is an attribute of the individual: there is no collective brain. When I first heard this, oh those many years ago, my first thought was: What about group brainstorming sessions? Don’t the best ideas typically come from getting smart people in a room to toss around ideas?

Philosophically, the answer is that group brainstorming does not consist of collective thought–it is the sum of the individual thought of all its participants. Someone can say something that leads to someone else coming up with an idea he might otherwise have missed, but both of them had to exert his own individual mental effort. Bottom line, the value of group bull sessions is perfectly consistent with individualism.

That said, I found this report both surprising and amusing. It turns out “the best size of a brainstorm group is: one.”

The results were unambiguous. The men in twenty-three of the twenty-four groups produced more ideas when they worked on their own than when they worked as a group. They also produced ideas of equal or higher quality when working individually. And the advertising executives were no better at group work than the presumably introverted research scientists. Since then, some forty years of research has reached the same startling conclusion. Studies have shown that performance gets worse as group size increases: groups of nine generate fewer and poorer ideas compared to groups of six, which do worse than groups of four. The“evidence from science suggests that business people must be insane to use brainstorming groups,” writes the organizational psychologist Adrian Furnham. “If you have talented and motivated people, they should be encouraged to work alone when creativity or efficiency is the highest priority.”

Who knew?

5 Comments to “There Really Is No Collective Brain”


  • Lionell Griffith says:

    I discovered well over three decades ago that if creativity and productivity is required, one can do the work of four, two can do the work of three, three can do the work of two, and four can do the work of one. For More than four, forget it, not much that is new, different, or effective happens. The primary reason is that the most effective people spend almost all their time in meetings that go nowhere or are writing progress reports to keep the rest of the group informed that there has been no progress.

  • Mike Kevitt says:

    If you think alone, by yourself, you spend more time per time period thinking, because you’re not spending time listening to others talk, and your train of thought is much less likely to be broken. So, you can think up more ideas per time period. But, when you think up some ideas, it might then be good to go to somebody, or to a group, to tell an idea, or two, to.

  • Chad Merritt says:

    “Who knew?”

    Anyone who ever had an idea of their own. ;)

  • Nikolai Zakharov says:

    The key word from the excerpt was “introverted”.
    The are numerous studies, which indicate that introverted individuals are, in fact, more productive and creative than their extraverted counterparts when it comes to brainstorming. And, implicitly, the requirement for the productive work of introverts is to let them work alone, that is to let their imagination flourish so it won’t be stomped by a “collective brain” or their collegues or managers.

    • Chad Merritt says:

      I don’t like the idea of introvert/extrovert. A man can be completely content with himself and extremely contemplative/rational and still be engaged with those around him.