Story Behind “The Secret History” Part III: The Most Important Company You Never Heard Of

1978. Two years out of the Air Force, serendipity (which would be my lifelong form of career planning) found me in Silicon Valley working for my first company: ESL. If you’re an entrepreneur, ESL is the most important company you’ve never heard of. If you are a practitioner of Customer Development, ESL was doing it before most us were born. If you think the Cold War turned out the right side up (i.e. Communism being a bad science experiment) ESL’s founder Bill Perry was moving the chess pieces. And no one who really knew could tell you.