Bestselling author David Epstein reveals why constraints—not unlimited resources—drive innovation and better decision-making. Through research on Pixar, General Magic, and NASA, Epstein shows how visible boundaries force teams to clarify priorities, spark creative problem-solving, and prevent the decision paralysis that kills startups. Making constraints visible—like Pixar's animator popsicle sticks—instantly clarifies trade-offs and helps teams allocate energy to what matters most, rather than obsessing over details no one notices.