As co-founder of the Silicon Valley venture capital firm Andreesen Horowitz and prior to that a software company sold to Hewlett-Packard for $1.6 billion, Ben Horowitz might be expected to have filled his new book with references to the technology companies with which he is so familiar. And, sure, the book What You Do Is Who You Are does contain plenty of references to the likes of Netflix, Slack and Uber. But these companies and their leaders do not provide the lessons that Horowitz uses in answering that central question:
