The five-year anniversary segment with a16z founders Ben Horowitz and Marc Andreessen picks up with a discussion of Clayton Christensen's theories around disruption. Why Christensen's thinking is very much on the mark today, and how his theories help guide the firm in making decisions about what NOT to invest in. Ben offers one of the things he wished he had known as a young CEO, and Marc describes a trait that every great entrepreneur possesses. Part two of two.