Most leaders say culture matters. Far fewer can explain how it's actually built. Mike Schroepfer spent more than a decade helping build Facebook's engineering organization during some of its fastest—and messiest—years of growth. As CTO, he helped shape a culture built around learning, experimentation, and moving quickly. In this episode, Mike discusses why great cultures aren't created through values decks or mission statements, how leaders teach people what matters through their behavior, and why the difference between a learning culture and a blame culture can determine an organization’s success. If culture is what happens when something goes wrong, this conversation is about how to build one that gets stronger under pressure.