History is littered with great firms that got killed by disruption. Of course, the personal computer, a technology that first took root as a toy, got Digital Equipment Corporation. Kodak missed the boat for a long time on digital imaging. Sony was slow to get MP3 technology. Microsoft doesn't know what to do with open source software. And so on.

Generally, the technology that enables disruption is developed in the companies that are the practitioners of the original technology. That's where the understanding of the technology first comes together. They usually can't commercialize the technology because they have to couple it with the business model innovation, and because they tend to try to take all of their technologies to market through their original business model, somebody else just picks up the technology and changes the world through the business model innovation.

Many think of management as cutting deals and laying people off and hiring people and buying and selling companies. That's not management, that's deal making. Management is the opportunity to help people become better people. Practiced that way, it's a magnificent profession.

At the beginning of almost every industry, the available products and services are so expensive to own and complicated to use that only people with a lot of money and a lot of skill have access to them. A disruptive technology is an innovation that simplifies the product and makes it so affordable that a whole new population of people can now have one and use it at the beginning for simple applications, and then it improves to the point that it makes the old technology obsolete.

If a company truly wants to resolve the innovator's dilemma, it does need to be able to create wave after wave of disruptive innovation. And those disruptive innovations will typically grow to the point where they do cause some pain for leading companies. But most disruptive innovations create substantial new growth before they cause that pain.

If you want to make better theory, you've got to use the best that's available and look through the lens of another discipline to see if you can uncover more anomalies. By looking at the phenomena of failure from the perspective of sales, marketing, finance, general management, and the equity markets, I was able to see things that Rebecca [Henderson] hadn't.

I have been blessed to see visions of eternity; and events in my future that have been important for me to foresee, have been revealed to me.