I'm Eric Ries, author of "The Lean Startup" and new book "Incorruptible" – AMA

What I hear you saying is that the original comment simply said that leadership by itself is enough to preserve the Costco ethos. It didn't say anything about size or Wall Street or anything else. Is that right?

The reason I responded the way that I did is that the claim that something by itself is enough has to explain why most companies are able to be destroyed, even though they have really good leadership. I think the common answer when people ask about Costco is that the reason why, for them, leadership was enough when it hasn't been for other people, is something like they're so large. Does that make sense?

Either way, in order to say that leadership by itself is sufficient, we have to figure out why Costco has been able to endure as a gigantic public company when, for most companies, the larger they become, the more valuable they become as a target. Meaning that Wall Street or other financial forces will intervene to change their values.

And the answer, which I lay out in the book (not in my original comment), is that Costco is protected by a very distinctive thing I call a "governance fortress." This fortress (and not merely their leadership) is the reason why they have been able to endure for forty years.

In fact, the predecessor company of Costco, spiritually speaking, was a company called FedMart that had the leadership and ethos but did not have the fortress. I'll leave it to you to read to find out what happened to them.

What's funny is when the book was published, I remember someone telling me that I should have included more examples of failed startups in the manuscript. I remember answering them, "Oh, I have. We just don't know which ones yet."

This is the difficulty of writing any kind of business book. There's just no way to use any company as an example to illustrate some principle without people misunderstanding that you're holding them up as the perfect or even great company. I use case studies to illustrate the concepts that I think are useful. I can't guarantee success any more than an athlete can tell you that if you study the way that Tony Gwynn hits the baseball, you too will be able to hit 300 in the big leagues.

How often do you see companies recover from financial gravity? Or is it mostly irreversible?

How much do you attribute worsening of company values to things like professional managers, too much hierarchy, and less founder-mode; versus financial gravity?

In a case like GitHub where their focus seems less on open-source these days, should developers try to help GitHub better support open-source or should the focus be on building alternatives?

Thanks, Jake