Understanding the World Through the Thomas Theorem
— Belief is a powerful thing —
Working on a doctoral thesis has sent me on a book learnin’ kick, and the other day I stumbled across something that, to my mind, reveals much about how the world works.
It’ s a genuine sociology precept called the Thomas Theorem. Formulated in 1928 by the sociologist William Isaac Thomas, it’s been described by one eminent scholar as “probably the single most consequential sentence ever put in print by an American sociologist.” Sometimes called the Thomas Dictum, it is accepted by many researchers as scientific fact—or at least as a powerful way of comprehending the human condition. Here it is:
If men define situations as real, they are real in their consequences.
The Thomas Theorum is no armchair theory. Law enforcement agencies use it to train officers in the handling of the mentally ill, and it’s been used effectively to explain everything from beauty contest outcomes to panic runs on bank deposits.
To me, the Thomas Theorem explains a lot: The healing power of religion, crowd behavior, a leader’ s ability to galvanize, the staying power of superstitions, Henry Ford’ s famous line that “whether you believe you can do a thing or not, you’ re right.”
Closer to my heart, the Thomas Theorem suggests that self-help books advocating the power of belief are basically right.
In fact, Thomas may have gleaned inspiration from one of the Granddaddies of the self-help movement, a man who intuitively understood the Thomas Theorum decades before Thomas himself: James Allen.
A soft-spoken, retired Englishman who lived quietly in the southwest coastal town of Ilfracombe, Allen wrote a short book about positive thinking called As a Man Thinketh. The key theme of Allen’ s ground-breaking book is that one’ s thoughts determine one’ s circumstances. As Allen put it:
A man is literally what he thinks, his character being the complete sum of all his thoughts … As the plant springs from, and could not be without, the seed, so every act of a man springs from the hidden seeds of thought, and could not have appeared without them.
And more to the point:
Most of us are anxious to improve our circumstances, but are unwilling to improve ourselves.
Oddly, Allen contradicted his own thesis when he decided that As a Man Thinketh was unworthy of publication. Fortunately, his wife disagreed, and the book spawned an industry now worth several hundred billion dollars each year.
You can view the complete text of As a Man Thinketh at sites such as the Project Gutenberg.
Allen died in 1912, long before witnessing the seminal effect his work had on today’ s gargantuan “wellness” industry. Allen wrote 19 books, many with undeniably broad appeal (it seems another becomes a bestseller in Japanese translation every year).
In my view, James Allen was to the self-help industry what Chuck Berry was to rock n’ roll music. Berry was influenced by many musicians, but he was the first to combine numerous traditional elements into an original, enduring new form.
Similarly, writers preceding Allen by decades—even centuries—covered comparable topics, but Allen crystallized the “power of positive thinking” concept in humble, poetic language utterly devoid of hucksterism (I haven’t read most of The Secret’s source texts, many of which preceded Allen and seem more focused on money-making—if you’ve read any, please share your thoughts).
Later self-help gurus—Dale Carnegie, Napoleon Hill, Tony Robbins, Wayne Dyer and many others—owe a huge debt to Allen. And the industry is poised for even more explosive growth, analysts say. Economist Paul Pilzer, in a book entitled The Next Trillion, predicted the U.S. wellness industry will be worth a trillion dollars by 2010. So there’ s plenty of opportunity to do good by helping others be well.
But most important, the Thomas Theorum suggests that our own fortune and fulfillment are, indeed, largely the result of our beliefs. In fact, I feel a new Clark Rule coming on … wait a minute … yes, here it is! And with an easy-to-remember acronym: TTTTT™ (Tim’s Take on The Thomas Theorum):
Make it real in your mind first, then real in fact.
Or as Mark and I put it in The Prosperous Peasant, our book of success parables: Conceivable Means Achievable.
(This post comes to you from the Soul Shelter archives)
You may also enjoy:
What We Really Need to be Happy
Life Without Principle (or Interest)



6 Comments to Understanding the World Through the Thomas Theorem
Lovely, lovely, lovely. Thanks for doing all the substantive reading for me. One of these years I’m gonna get me a Kindle and download all the great books you’ve reminded me of.
You are most welcome. I suggest you skip the Kindle for now and hit your local library
Tim
Thanks for the great reminder! It’s easy for me to forget that I am in charge sometimes
Great article!
I found that, for me, both the Thomas Theorem and Allen’s work codify in a more understandable way Descartes’s premise of “I think; therefore, I am”. I think a lot of people misinterpret that phrase, but it makes more sense in this context that a person is the product of their thoughts/choices.
Never thought of that, Brian, and it makes good sense.
Reminds me that all this stuff is just old wine in new bottles
hi, stumbled across ur blog while googling for thomas theorem. Thanks for this insightful article.
Is that other websites besides Wikipedia, you could recommend for me to read on Thomas Theorem for my exams? Much appreciated.