"There's one common theme in all my activities: I run away from conventional wisdom at every opportunity. That's why "unreasonable thinking" is the subject of this book. It has helped me build two Fortune 500 companies, and give away $6 billion to endow some of the greatest contemporary art museums, scientific research centers, and K-12 education initiatives in the world. Of course along the way, I've been celebrated and condemned. I've been called all kinds of names, some of them accurate. You've got to be ready for that if you're going to do anything big. By contrast, most people and institutions take a "reasonable" approach to problems, which I call "Of Course Not" thinking. When faced with the prospect of a new or different approach, they will come up with all the reasons something can’t be done and conclude, "Of course not" because, after all, no one else is doing it that way. This book hopes to explain the "unreasonable" methodologies that got me to where I am, with the hope will be of use to you."