The founder of the world’s largest privately held media company joins us to look back on a career that flourished along with the rise of the modern media agency era. We talk about the explosion of data that digital has brought with it, and why he has chosen to rent rather than own data. We look at the streaming wars and talk about Horizon's loss of Disney as a client last year, plus where the company is growing today. Plus, a discussion of culture, talent, the pros and cons of remaining defiantly independent--and under what circumstances he'd ultimately sell.