Although Event Sourcing has been around for many years, it remains outside the mainstream paradigm of software development. But it is an approach to building software with a long track record of success. With Event Sourcing, we place the highest value on the simple capture of essential business events without attempting to interpret them. By placing business concepts at the heart of our code, we can decouple systems into small services that can be quickly built, changed, and replaced. The resulting systems have single responsibilities and are decoupled from each other, which makes them simple to modify. Event Sourcing can enable us to move faster by supporting rapid experimentation with new perspectives, new user interactions, and new insights into our business. This talk will show you how.