"Because Aristotle's was the accepted lens on the universe, centuries of medieval scientists and thinkers went to great lengths to make epicycles work. It wasn't until the sixteenth century, with one simple but profound observation, that Renaissance astronomer Nicolaus Copernicus reframed our view of the universe. The planets revolved not around the earth, but around the sun. Finally, understanding that provided a foundation for some of the most important advances in history and the foundation for modern astronomy and calculus. Of course, it took eighteen centuries for someone like Copernicus to see and articulate the flaws in Aristotle's logic. And even he died without knowing that the world would accept he was right. Changing a well-established view of the world rarely happens overnight--and even when it happens, it still takes time to refine and perfect the right new perspective. In the world of innovation, many companies are stuck in a world of creating "epicycles": elaborate approximations, estimations, and extrapolations. Because we gather, fine-tune, and cross-reference all manner of data, it seems like we should be getting better and better at predicting success. But if we fail to understand why customers make the choices they make, we're just getting better and better at a fundamentally flawed process. Without the right understanding of the causal mechanism at the center of the innovation universe, companies are trying to make sense of the universe revolving around the earth. They're forced to rely on an array of borrowed best practices, probabilistic tools, and tips and tricks that have worked for other companies, but which can't guarantee success. As you look at innovation through the lenses of the Jobs Theory, what you see is not the customer at the center of the innovation universe, but the customer's Job to Be Done. It may seem like a small distinction--just a few minutes of arc--but it matters a great deal. In fact, it changes everything."