Cook introduces the concept of being a builder as the alternative to the credit-without-responsibility culture he's spent the first half of the speech dismantling. He quotes Madeleine L'Engle — 'Humility is throwing oneself away in complete concentration on something or someone else' — to define humility not as being smaller but as serving something greater. The best founders, he says, aren't the ones who take the most credit; they're the ones whose creations last and whose reputations grow rather than shrink with time. They spend most of their time building, piece by piece. To illustrate, Cook tells the story of the Stonewall riots — people who had no idea what history had in store for them, who built something they would never see completed. He was eight years old and a thousand miles away when it happened, yet he will never stop being grateful for what they had the courage to build.