Because I’m not a quantitative researcher, the conclusions I draw here are not based on reams of statistics or finely crunched data, but rather on my observations as a consultant over the past twenty years. But as Jim Collins, the research giant, once told me, qualitative field research is just as reliable as the quantitative kind, as long as clients and readers attest to its validity. And I’m happy to say that based on my experience with executives and their organizations, the principles in this book have proven to be as reliable as they are simple.

