Reid Hoffman is one of Silicon Valley’s grown-ups. After helping to found PayPal, he moved on to found LinkedIn, in 2002, which has turned him into a billionaire. He was an early investor in Facebook and now serves as a partner at the venture capital firm Greylock. He’s written two books, The Start-Up of You (with Ben Casnocha) and The Alliance: Managing Talent in the Networked Age (with Casnocha and Chris Yeh).

A version of this article appeared in the April 2016 issue (pp.45–50) of Harvard Business Review.