The U.S. stock markets rank among the greatest creators of wealth that humankind has ever known.

That's why individuals such as Warren Buffett, Peter Lynch, and Philip Fisher, have built fortunes for themselves, and for investors, by carefully researching stocks and buying great companies.

They inspire hope that we can do the same.

Replicate their riches
But what separates Buffett, Lynch, and Fisher from most investors is their disciplined and decades-long commitment to learning. That's what made them masters. To build our own fortunes in the stock market, then, we must learn about the past with as much zeal as we predict the future.

With that as introduction, I'd like to examine one key trait of the stock market's biggest long-term winners. Over the years, the stocks have increased hundreds of times in value, thanks to one simple key: An organization that was built to last 100 years or more.

A profit panacea
What does such an organization look like? The writings of Buffett, Lynch, and Fisher provide some hints:

  1. Management of unquestionable commitment and integrity.
  2. A long-term view toward value creation.
  3. Relentless focus on dominating and growing its economic niche.

While this short checklist is by no means exhaustive, it's worth assessing all of your holdings against it. Companies such as Vonage (NYSE:VG) and Sirius Satellite Radio (NASDAQ:SIRI), for example, are burning through cash and piling up obligations. They're likely not considering the consequences for the next decade, let alone the next century.

Contrast that with John Mackey's Whole Foods (NASDAQ:WFMI) or Scott Cook's Intuit (NASDAQ:INTU). The former is a model for employee relations and brand building. The latter leveraged its focus on customer needs into an enormous competitive advantage. Even the recent memo in which Starbucks (NASDAQ:SBUX) chairman Howard Schultz warned that company's brass against "The Commoditization of the Starbucks Experience" was less a red flag than a reminder that Starbucks, since its beginning, has been built to last.

Why this? Why now?
This lesson is in my head because of a challenge issued seven years ago on our discussion boards by a Buffett critic. He wrote, "I invite any of you to compare the returns of CMGI or Internet Capital Group to the returns of Berkshire Hathaway over the next 20 to 50 years and see which does better."

We're just seven years out, but the "challenge" is long over. Since the date of that post, CMGI and Internet Capital Group are each down more than 98%. Berkshire has nearly doubled and remains, by my calculations, undervalued.

After all, with Warren Buffett at the helm, Berkshire has a model CEO. His judicious use of the company's cash hoard and refusal to split the stock despite widespread criticism are evidence of his long view. And the current marketing innovations by GEICO, as well as recent complementary acquisitions, indicate that this $160 billion organization isn't yet resting on its laurels.

Put theory into practice
At Motley Fool Stock Advisor, Fool co-founders David and Tom Gardner focus on finding precisely these types of organizations. Often, the recommendations look very different. The companies may be small or large, a video game maker or a reinsurer, dividend-paying or not. But what they share is the potential to achieve greatness over the next 100 years or more and to make a fortune in your portfolio along the way.

If those sound like the kinds of companies you'd like to learn more about, then click here to join Stock Advisor free for 30 days. Our picks are currently beating the market by nearly 35 percentage points on average, and there is no obligation to subscribe.

This article was first published on Feb. 8, 2007. It has been lovingly updated.

Tim Hanson owns shares of Berkshire Hathaway and Whole Foods. Berkshire Hathaway is an Inside Value pick. Whole Foods and Starbucks are Stock Advisor recommendations. No Fool is too cool for disclosure.