“We need teams of missionaries, not teams of mercenaries. Mercenaries build whatever they're told to build. Missionaries are true believers in the vision and are committed to solving problems for their customers.”
Missionaries vs. Mercenaries
From Inspired: How to Create Tech Products Customers Love (2nd ed., Wiley, 2017), Chapter 9, “Principles of Strong Product Teams.” The first sentence is Cagan quoting John Doerr, whose missionary-vs-mercenary framing for venture-backed founders was laid out in an April 2000 Knowledge@Wharton writeup of a Wharton conference talk; the next two sentences are Cagan’s, adapting the frame from founders to product teams. Cagan had already used the same passage in a 2015 SVPG post titled “Missionaries vs. Mercenaries,” and the idea gets a book-length treatment in Empowered (Cagan and Jones, Wiley, 2020).
Chapter 9 introduces the missionary idea as the first of ten parallel principles of strong product teams. The others are structural: composition, empowerment and accountability, autonomy, durable scope. Cagan doesn’t argue any of them produces the others; he argues a strong product team has all of them. The slogan condenses one of those ten properties into the punchy form people remember. The recipe for actually getting that property gets its own chapters across the rest of the book: communicating the vision often enough that the team internalizes it, and giving them the customer contact and outcome accountability to act on it.